Honda Modification

Different stages of cylinder head development include special combination of porting and polishing, redirected ports, and multi-angle valve seats to full radius-blended valve seats. We don't use shortcuts, such as grinding and sandblasting combustion chambers, and our heads are meticulously, deshrouded and polished, Every head that comes to DPR is specifically built to the owner's needs (i.e., naturally aspirated, forced induction, nitrous oxide). As anyone with any automotive credibility realizes, when it comes to cylinder heads there is no such thing as "One Size Fits All". Don't settle for whatever is gathering dust on warehouse shelves! You deserve the best. You deserve a DPR cylinder head!

honda car 1

 

 

 

honda grey

 

 

 

honda drive

 

 

 

honda white

 

 

 

honda race

HEAD REFRESH 
Complete Teardown
Complete Visual Inspection
Check All Surfaces for Straightness
Inspect Valve Train for Wear
Fully Degreased & Cleaned
Competition Valve Job
Starting at $375.00 USD (Labor Only)

POCKET PORT 
Head Refresh Plus...
Cylinder Head Deburred
Deshrouded & Polished Combustion Chambers
Radiused Blend Seats
Hand-Lapped & Vacuum-Tested Valve Seats 
New Valve Seals
Complete Assembly

Bowl Port & Polish (behind valve seat)
1 Inch Gasket Match Port & Polish (Intake & Exhaust)
Starting at $790.00 USD (Labor Only)

STAGE IV 
Pocket Port Plus...
Competition Port & Polish 
Deshrouded & Polished Combustion Chambers
Back-Cut Valves 
Radiused Blend Seats
Competition Three-Angle Valve Job 
Hand-lapped & Vacuum-Tested Valve Seats
Starting at $1150.00 USD (Labor Only)

STAGE V 
Stage IV plus... 
Cylinder Head Deburred & Blueprinted 
Combustion Chambers C.C.'d 
Detailed Matched Intake Manifold Fully Ported to Head
Matched Throttle Body
Match Port Exhaust Manifolds
Port Faces Lapped Flat (Studs removed and reinstalled)
Decks Milled & Lapped (At any amount with no additional charge)
Radiused Cut Seats
Starting at $1350.00 USD (Labor Only)

STAGE VI 
Stage V plus...
Combustion Chambers Welded & Reshaped (clover-leaf pent-roof design)
Intake Valves Lightened
Rocker Arms Lightened
Fully Balanced & Blueprinted 
Includes Valve Spring Shims as Needed
Starting at $1575.00 USD (Labor Only)

STAGE VII 
Special Turbo/Supercharged Application
Call for Detials: DPR (310) 523-4074

STAGE VIII

Call for Detials: DPR (310) 523-4074

VALVETRAIN COMPONENTS
Dual Springs
Single Springs
Standard Size Stainless Steal Heat Treated Nitrite Coated Valves
Oversized Valves
Titanium Retainers
Valve Keepers
Spring Seats
Valve Guides

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