Mitsubishi
Specifically Designed and Modified
Cylinder Heads


VIEW Details ===> Head Refresh<==>Stage I<==>Stage II<==>Stage III<==>Stage IV

Most Popular Mitsubishi Engine Applications (others available):
4G63 4G64 4G67 4G92 G54B 6G72 All Turbo Applications

Select ANY picture to enlarge

Disassembly/Inspection

Detailed Inspection

Cleaning Parts

Remove Burrs

Check Valve Springs

Check Valves

Measure Cam lobes

Lapping Surface

Microlon Treatment(s)

Clean Valve Trains

Guides Ready to Install

Springs Ready to Install

Porting in progress

Ported heads

Eclipse Engine

DPR Racing's Famous Mitsubishi Cylinder Heads!- Insanely FAST!!!

Mitsubishi - Head Refresh _______________________________________________________________________
Pre-inspect cylinder head.
Disassemble for inspection and cleaning including:

- Failure analysis
- Check all surfaces for straightness
- Measure and record valve tip to base length
- Estimate including valve stem wear
- Remove carbon, clean head, and valve train components
- Calculate valve guide to stem tolerance
- Inspect deck surface finish for corrosion scratches, impact damage
  or warping/cracking
- Inspect studs. threaded holes and cam journals for wear and
  clearance
- Inspect and test valve springs
- Inspect keepers and retainers
- Inspect heads and valve train for any signs of valve float
Lap, port faces and upper cap and gasket area
Hand lap valves
Vacuum test
Clean for assembly
Final Assembly

  $495 (Labor Only) 4 Cyl Price Shown
  Contact us at customerservice@dprracing.com to request cylinder head work.


  [back to top]

Mitsubishi - Head Refresh Extras:

- DPR's CUSTOM 1G to 2G Conversion
  Conversion for 2G Small Port Cylinder heads
  Open intake Runners to Flowlike a 1G Cylinder head
  Starting at $150.00(Labor Only)
- DPR Valves Oversize (+0.5, +1.0) (IN/EX) $30
- DPR PCS Valve Spring Kit(Springs and Titanium Retainers) $380
- DPR Dual Springs $320
- DPR Titanium retainers (For single and dual springs, NOT PCS springs) $220
- Microlon CL100 - Add to Engine,Trans,PS for newer 4-8 cyl
  $183.96+shipping   (Click here for "Microlon" Products)
- Fuel Injectors - Complete Service $24 each
  (before,after,pattern flow printout) (Click to visit "RC Injectors" site)
- Lash Cam(s) $250
- Remove rocker arms $12 (Click here for Rocker Arm Information)
- Rebuild rocker arms includes polishing shafts, adjuster tips and surface $155
  (Click here for Rocker Arm Information)
- Lighten rocker arms $155 (Click here for Rocker Arm Information)
- Measure and record one combustion chamber volume$18
- Or balance all four volumes plus/minus 0.4cc $60
- Balance plus/minus 0.15cc $80
- Microlon Treatment - Valves,Rockers,Cam(s),Springs & Retainers $60
  (Click here for "Microlon" Treatment)
- Valve and seat cut $5 each
- Mill deck surface $60
- Lap deck surface $20
- Custom fit cam caps to head and camshafts WCP treatment
  (Click to visit "WCP" site)
- Polish camshaft journals $40
- Align bore cam journals and caps $40
- Valve guide replacement includes removal of valve guide, special head prep.
  hone guide to fit valve stems $75 labor

  [back to top]



Mitsubishi - Stage I
Competition Multi-Angle Valve Job
_______________________________________________________________________
Pre-inspect cylinder head.
Disassemble for inspection and cleaning including:
re-inspect cylinder head.
Disassemble for inspection and cleaning including:

- Failure analysis
- Check all surfaces for straightness
- Measure and record valve tip to base length
- Estimate including valve stem wear
- Remove carbon, clean head, and valve train components
- Calculate valve guide to stem tolerance
- Inspect deck surface finish for corrosion scratches, impact damage or
  warping/cracking
- Inspect studs. threaded holes and cam journals for wear and clearance
- Inspect and test valve springs
- Inspect keepers and retainers
- Inspect heads and valve train for any signs of valve float
Light debur
Lap, port faces and upper cap and gasket area
Competition high flow multi angle valve job with preparatory angles
Hand lap valves
Vacuum test
Set up proper seat pressure and clearances
Final clean for assembly
Preassembly inspection
Final Assembly

  $695 (Labor Only) 4 Cyl Price Shown
  Contact us at customerservice@dprracing.com to request cylinder head work.

  [back to top]

Mitsubishi - Stage I Extras:

- DPR's CUSTOM 1G to 2G Conversion
  Conversion for 2G Small Port Cylinder heads
  Open intake Runners to Flowlike a 1G Cylinder head
  Starting at $150.00(Labor Only)
- Combustion Chambers Welded & Reshaped (clover-leaf pent-roof design) $XXX.00(Labor Only)
- Port Faces Lapped Flat (Studs removed and reinstalled) $XXX.00(Labor Only)
- DPR Valves Oversize (+0.5, +1.0) (IN/EX) $30
- DPR PCS Valve Spring Kit(Springs and Titanium Retainers) $380
- DPR Dual Springs $320
- DPR Titanium retainers (For single and dual springs, NOT PCS springs) $220
- Microlon CL100 - Add to Engine,Trans,PS for newer 4-8 cyl
  $183.96+shipping   (Click here for "Microlon" Products)
- Fuel Injectors - Complete Service $24 each
  (before,after,pattern flow printout) (Click to visit "RC Injectors" site)
- Bore out throttle body and install larger plate by RC Injectors $150
  (Click to visit "RC Injectors" site)
- Lash Cam(s) $250
- Measure and record one combustion chamber volume $18
- Or balance all four volumes plus/minus 0.4cc $60
- Balance plus/minus 0.15cc $80
- Microlon treatment $35 to $50(Click here for "Microlon" Treatment)
- Ceramic coat combustion chambers 4 Cyl $180
- Ceramic coat valve faces $10/Per valve
- Ceramic coat exhaust valve radius $12/Per valve
- Ceramic coat exhaust ports With Chmbrs/$15 Each
- Thermal dispersion coat head Call for pricing!
- Combustion chambers matched to the bore. Deshroud valve area.
  Shape and polish. Call for pricing!
- Measure and match volumes with valves installed after seat cut $200
- Custom combustion chamber modifications such as high swirl chambers,
  lower combustion chambers, stop chambers. Call for pricing!
- Mill deck surface $60
- Diamond intake port finish $60
- Lap deck surface $20
- Custom fit cam caps to head and camshafts WCP treatment
  (Click to visit "WCP" site)
- Polish camshaft journals $40/cam
- Align bore cam journals and caps $40/cam
- Machine oil groves in camshaft journals $40/cam
- Machine oil retention grove in cam cap $35/cam
- Flow testing $100.00 per hour (View "Flow Bench" Explanation)
- Port match intake manifold $60.00 - $100.00
- Valve guide replacement includes removal of valve guide, bore prep.
  Hone guide to fit valve stems. $75 labor
- Polish one set (16) cam cap dowel pins and dowel receiving bore. Remove
  oxidation, rust and corrosion for proper fit, prevents seizing and
  improperly located caps. $50
- If utilizing heavy valve springs, hi rpm, fast cam ramp, we suggest WCP
  treatment to cam caps and/or oil channel modification. Call for pricing!
  (Click to visit "WCP" site)



[back to top]


Mitsubishi - Stage II -
Multi-Angle Valve Job/Pocket Port Job
_______________________________________________________________________
Pre-inspect cylinder head.
Disassemble for inspection and cleaning including:
re-inspect cylinder head.
Disassemble for inspection and cleaning including:

- Failure analysis
- Check all surfaces for straightness
- Measure and record valve tip to base length
- Estimate including valve stem wear
- Remove carbon, clean head, and valve train components
- Calculate valve guide to stem tolerance
- Inspect deck surface finish for corrosion scratches, impact damage or
  warping/cracking
- Inspect studs. threaded holes and cam journals for wear and clearance
- Inspect and test valve springs
- Inspect keepers and retainers
- Inspect heads and valve train for any signs of valve float
Debur
Lap, port faces and upper cap and gasket area
Port and polish intake and exhaust
Gasket match, port 30mm into ports and pocket port under seats
Light combustion chamber polish
Competition high flow multi angle valve job with preparatory angles
Hand lap valves
Vacuum test
Set up proper seat pressure and clearances
Final clean for assembly
Preassembly inspection
Final Assembly

  $1,250 (Labor Only) 4 Cyl Price Shown
  Contact us at customerservice@dprracing.com to request cylinder head work.

[back to top]

Mitsubishi - Stage II Extras:

- DPR's CUSTOM 1G to 2G Conversion
  Conversion for 2G Small Port Cylinder heads
  Open intake Runners to Flowlike a 1G Cylinder head
  Starting at $150.00(Labor Only)
- Combustion Chambers Welded & Reshaped (clover-leaf pent-roof design) $XXX.00(Labor Only)
- Port Faces Lapped Flat (Studs removed and reinstalled) $XXX.00(Labor Only)
- DPR Valves Oversize (+0.5, +1.0) (IN/EX) $30
- DPR PCS Valve Spring Kit(Springs and Titanium Retainers) $380
- DPR Dual Springs $320
- DPR Titanium retainers (For single and dual springs, NOT PCS springs) $220
- Microlon CL100 - Add to Engine,Trans,PS for newer 4-8 cyl
  $183.96+shipping   (Click here for "Microlon" Products)
- Fuel Injectors - Complete Service $24 each
  (before,after,pattern flow printout) (Click to visit "RC Injectors" site)
- Bore out throttle body and install larger plate by RC Injectors $150
  (Click to visit "RC Injectors" site)
- Lash Cam(s) $250
- Measure and record one combustion chamber volume $18
- Or balance all four volumes plus/minus 0.4cc $60
- Balance plus/minus 0.15cc $80
- Microlon treatment $35 to $50(Click here for "Microlon" Treatment)
- Ceramic coat combustion chambers 4 Cyl $180
- Ceramic coat valve faces $10/Per valve
- Ceramic coat exhaust valve radius $12/Per valve
- Ceramic coat exhaust ports With Chmbrs/$15 Each
- Thermal dispersion coat head Call for pricing!
- Combustion chambers matched to the bore. Deshroud valve area.
  Shape and polish. Call for pricing!
- Exhaust manifold port match $60 - $100
- Measure and match volumes with valves installed after seat cut $200
- Custom combustion chamber modifications such as high swirl chambers, lower
  combustion chambers, stop chambers. Call for pricing!
- Mill deck surface $60
- Diamond intake port finish $60
- Lap deck surface $20
- Custom fit cam caps to head and camshafts WCP treatment
  (Click to visit "WCP" site)
- Polish camshaft journals $40/cam
- Align bore cam journals and caps $40/cam
- Machine oil groves in camshaft journals $40/cam
- Machine oil retention grove in cam cap $35/cam
- Flow testing $100.00 per hour (View "Flow Bench" Explanation)
- Port match intake manifold $60.00 - $100.00
- Valve guide replacement includes removal of valve guide, bore prep.
  Hone guide to fit valve stems. $75 Labor
- Polish one set (16) cam cap dowel pins and dowel receiving bore. Remove
  oxidation, rust and corrosion for proper fit, prevents seizing and
  improperly located caps. $50
- If utilizing heavy valve springs, hi rpm, fast cam ramp, we suggest WCP
  treatment to cam caps and/or oil channel modification.
  (Click to visit "WCP" site)

[back to top]



Mitsubishi - Stage III -
Competition Multi-Angle Valve Job, FULL Port & Polish Job
_______________________________________________________________________

Pre-inspect cylinder head.
Disassemble for inspection and cleaning including:
re-inspect cylinder head.
Disassemble for inspection and cleaning including:

- Failure analysis
- Check all surfaces for straightness
- Measure and record valve tip to base length
- Estimate including valve stem wear
- Remove carbon, clean head, and valve train components
- Calculate valve guide to stem tolerance
- Inspect deck surface finish for corrosion scratches, impact damage or
  warping/cracking
- Inspect studs. threaded holes and cam journals for wear and clearance
- Inspect and test valve springs
- Inspect keepers and retainers
- Inspect heads and valve train for any signs of valve float
Debur
Lap, port faces and upper cap and gasket area
Port and polish entire intake and exhaust
Gasket match, and fully port intake and exhaust
Lightly de-shroud combustion chamber polish
CC Chamber and match all four volumes
Competition multi angle valve job with preparatory angles
Back cut intake valves
Hand lap valves
Vacuum test
Set up proper seat pressure and clearances
Final clean for assembly
Preassembly inspection
Final Assembly

  $1,550 (Labor Only) 4 Cyl Price Shown
  Contact us at customerservice@dprracing.com to request cylinder head work.

[back to top]

Mitsubishi - Stage III Extras:

- DPR's CUSTOM 1G to 2G Conversion
  Conversion for 2G Small Port Cylinder heads
  Open intake Runners to Flowlike a 1G Cylinder head
  Starting at $150.00(Labor Only)
- Combustion Chambers Welded & Reshaped (clover-leaf pent-roof design) $XXX.00(Labor Only)
- Port Faces Lapped Flat (Studs removed and reinstalled) $XXX.00(Labor Only)
- DPR Valves Oversize (+0.5, +1.0) (IN/EX) $30
- DPR PCS Valve Spring Kit(Springs and Titanium Retainers) $380
- DPR Dual Springs $320
- DPR Titanium retainers (For single and dual springs, NOT PCS springs) $220
- Microlon CL100 - Add to Engine,Trans,PS for newer 4-8 cyl
  $183.96+shipping   (Click here for "Microlon" Products)
- Fuel Injectors - Complete Service $24 each
  (before,after,pattern flow printout) (Click to visit "RC Injectors" site)
- Bore out throttle body and install larger plate by RC Injectors $150
  (Click to visit "RC Injectors" site)
- Lash Cam(s) $250
- Measure and record one combustion chamber volume $18
- Or balance all four volumes plus/minus 0.4cc $60
- Balance plus/minus 0.15cc $80
- Microlon treatment $35 to $50(Click here for "Microlon" Treatment)
- Ceramic coat combustion chambers 4 Cyl $180
- Ceramic coat valve faces $10/Per valve
- Ceramic coat exhaust valve radius $12/Per valve
- Ceramic coat exhaust ports With Chmbrs/$15 Each
- Ceramic coat inside/outside intake manifold Call for pricing!
- Oil dispersement coat under piston Call for pricing!
- Thermal dispersion coat head Call for pricing!
- Combustion chambers matched to the bore. Deshroud valve area.
  Shape and polish.Call for pricing!
- Exhaust manifold port match $60 - $100
- Measure and match volumes with valves installed after seat cut $300
- Custom combustion chamber modifications such as high swirl chambers, lower
  combustion chambers, stop chambers. Call for pricing!
- Mill deck surface $60
- Diamond intake port finish $60
- Lap deck surface $20
- Custom fit cam caps to head and camshafts WCP treatment
  (Click to visit "WCP" site)
- Polish camshaft journals $40/cam
- Align bore cam journals and caps $40/cam
- Machine oil groves in camshaft journals $40/cam
- Machine oil retention grove in cam cap $35/cam
- Flow testing $100.00 per hour (View "Flow Bench" Explanation)
- Port match intake manifold $60.00 - $100.00
- Valve guide replacement includes removal of valve guide, bore prep.
  Hone guide to fit valve stems. $75 Labor
- Polish one set (16) cam cap dowel pins and dowel receiving bore. Remove
  oxidation, rust and corrosion for proper fit, prevents seizing
  and improperly located caps. $50
- If utilizing heavy valve springs, hi rpm, fast cam ramp, we suggest WCP
  treatment to cam caps and/or oil channel modification.
  (Click to visit "WCP" site)

[back to top]


Mitsubishi - Stage IV -
Competition Multi-Angle Valve Job, FULL Port & Polish Job and Combustion Chamber Mods
_______________________________________________________________________
Pre-inspect cylinder head.
Disassemble for inspection and cleaning including:
re-inspect cylinder head.
Disassemble for inspection and cleaning including:

- Failure analysis
- Check all surfaces for straightness
- Measure and record valve tip to base length
- Estimate including valve stem wear
- Remove carbon, clean head, and valve train components
- Calculate valve guide to stem tolerance
- Inspect deck surface finish for corrosion scratches, impact damage or
  warping/cracking
- Inspect studs. threaded holes and cam journals for wear and clearance
- Inspect and test valve springs
- Inspect keepers and retainers
- Inspect heads and valve train for any signs of valve float
Debur
Lap, port faces and upper cap and gasket area
De-flashed inside out
Modify oil returns
Competition port and polish intake and exhaust
Gasket match or any intake/exhaust design fully port
Radius exhaust seats
De-shroud combustion chamber polish
CC Chamber and match all four volumes
Competition high flow multi angle valve job with preparatory angles
Port Faces Lapped Flat (Studs removed and reinstalled)
Detailed Matched Intake Manifold Fully Ported to Head
Back cut intake valves
Hand lap valves
Vacuum test
Set up proper seat pressure and clearances
Blue print with documentation
Final clean for assembly
Preassembly inspection
Final Assembly

  $2,050 (Labor Only) 4 Cyl Price Shown
  Contact us at customerservice@dprracing.com to request cylinder head work.

  [back to top]


Mitsubishi Stage - IV Extras:

- DPR's CUSTOM 1G to 2G Conversion
  Conversion for 2G Small Port Cylinder heads
  Open intake Runners to Flowlike a 1G Cylinder head
  Starting at $150.00(Labor Only)
- Combustion Chambers Welded & Reshaped (clover-leaf pent-roof design) $XXX.00(Labor Only)
- Port Faces Lapped Flat (Studs removed and reinstalled) $XXX.00(Labor Only)
- DPR Valves Oversize (+0.5, +1.0) (IN/EX) $30
- DPR PCS Valve Spring Kit(Springs and Titanium Retainers) $380
- DPR Dual Springs $320
- DPR Titanium retainers (For single and dual springs, NOT PCS springs) $220
- Microlon CL100 - Add to Engine,Trans,PS for newer 4-8 cyl
  $183.96+shipping   (Click here for "Microlon" Products)
- Fuel Injectors - Complete Service $24 each
  (before,after,pattern flow printout) (Click to visit "RC Injectors" site)
- Bore out throttle body and install larger plate by RC Injectors $150
  (Click to visit "RC Injectors" site)
- Lash Cam(s) $250
- Ceramic coat combustion chambers 4 Cyl $180
- Ceramic coat valve faces $10/Per valve
- Ceramic coat exhaust valve radius $12/Per valve
- Ceramic coat exhaust ports With Chmbrs/$15 Each
- Ceramic coat inside/outside intake manifold Call for pricing!
- Oil dispersement coat under piston Call for pricing!
- Thermal dispersion coat head Call for pricing!
- Combustion chambers matched to the bore. Deshroud valve area. Shape
  and polish. Call for pricing!
- Modify Combustion chamber "Quench Area" to direct and shape the
  explosion of combustion. $30/Cyl
- Exhaust manifold port match $60 - $100
- Measure and match volumes with valves installed after seat cut $300
- Custom combustion chamber modifications such as high swirl chambers,
  lower combustion chambers, stop chambers. Call for pricing!
- Mill deck surface $60
- Diamond intake port finish $60
- Lap deck surface $20
- Custom fit cam caps to head and camshafts WCP treatment
  (Click to visit "WCP" site)
- Polish camshaft journals $40/cam
- Align bore cam journals and caps $40/cam
- Machine oil groves in camshaft journals $40/cam
- Machine oil retention grove in cam cap $35/cam
- Flow testing $100.00 per hour (View "Flow Bench" Explanation)
- Port match intake manifold $60.00 - $100.00
- Enlarge manifold for oversized throttle body. $100 and UP!
  (May be included in manifold porting)
- Valve guide replacement includes removal of valve guide, bore prep.
  Hone guide to fit valve stems. $75 Labor
- Polish one set (16) cam cap dowel pins and dowel receiving bore. Remove
  oxidation, rust and corrosion for proper fit, prevents seizing
  and improperly located caps. $50
- If utilizing heavy valve springs, hi rpm, fast cam ramp, we suggest WCP
  treatment to cam caps and/or oil channel modification.
  (Click to visit "WCP" site)

[back to top]

  Contact us at customerservice@dprracing.com to request cylinder head work.




Mitsubishi Custom cylinder heads can be supplied outright. Contact us for availability and details. Stage V,VI and VII custom modifications available for COMPETITION USE ONLY!!!


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