Nissan/Infinity
Specifically Designed and Modified
Cylinder Heads


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

Most Popular Nissan/Infinity Engine Applications (others available): (others available):
GA16 KA24 L28E SR20 VG30 VG33 VG35 RB20E RB20ET RB26 IS300

DPR Racing's "World Famous Nissan/Infinity Cylinder Heads"!
Nissan/Infinity - 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
    + Add 50% for 6 Cyl    

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


  [back to top]

Nissan/Infinity - Head Refresh Extras:

- 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]



Nissan/Infinity - 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

  $595 (Labor Only) 4 Cyl Price Shown
    + Add 50% for 6 Cyl    


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

  [back to top]

Nissan/Infinity - Stage I Extras:

- 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
  Dual Plane Manifolds $100.00 - $250.00
- 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]



Nissan/Infinity - 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

  $950 (Labor Only) 4 Cyl Price Shown
    + Add 50% for 6 Cyl    
  Contact us at customerservice@dprracing.com to request cylinder head work.

[back to top]

Nissan/Infinity - Stage II Extras:

- 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
  Dual Plane Manifolds $100.00 - $250.00
- 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]



Nissan/Infinity - Stage III -
Competition Multi-Angle Valve Job, FULL Port & Polish Job
_______________________________________________________________________
Pre-inspect cylinder head.
Disassemble for inspection and cleaning including:

- Failure analysis
- Check all surfaces for straightness
- Remove carbon, clean head, and valve train components
- Measure and record valve tip to base length
- Estimate including valve stem wear
- Calculate valve guide to stem tolerance
- Inspect deck surface finish for corrosion scratches, cracks, impact damage or
  warping
- Inspect studs, threaded holes and cam journals (cams, if provided) for wear and clearance
- Inspect and test valve springs, check pressure
- 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
Set up proper valve seat pressure, check clearances
Final clean for assembly
Vacuum test
Preassembly inspection
Final Assembly

      $790 (Labor Only) 4 Cyl, 2-valve heads
        $950 (Labor Only) 4 Cyl, 4-valve heads
     $1,175 (Labor Only) 6 Cyl, 2-valve heads
     $1,425 (Labor Only) 6 Cyl, 4-valve heads

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

[back to top]

Nissan/Infinity/Datsun - Stage III Extras:

- 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
  Dual Plane Manifolds $100.00 - $250.00
- 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]


Nissan/Infinity - 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
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

  $1,500 (Labor Only) 4 Cyl Price Shown
    + Add 50% for 6 Cyl    
  Contact us at customerservice@dprracing.com to request cylinder head work.

  [back to top]


Nissan/Infinity Stage - IV Extras:

- 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
  Dual Plane Manifolds $100.00 - $250.00
- 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)

Nissan/Infinity 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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