The All New 77mm Bore DH-Racing.com Billet STEALTH Throttle Body
After years of persistence comes perfection.
83mm inlet SuperFlow® tested and tuned to 77mm plate / exit
DH-Racing engineered on the SuperFlow® for absolute maximum CFM capacity
3/8" heavy duty hardened steel shaft
Hard anondized, non-stick, non-corrosive coating to prevent butterfly sticking and surface damage
Quad-sealed (2 seals on each side) to prevent vacuum leaks
Steel throttle rotor, similar to Honda's, prevents cable fraying or breaks
Dual throttle return springs
Dual needle bearings - high quality, low friction
Brass idle control screw for precision adjustments
Manufactured and hand assembled in the U.S.A.
All bolts use Loctite™ to prevent back-outs
Order yours today for $350 usd + $20 S/H. (+$19 USD for International)
Dome Top True High Compression Racing Valves
DH-Racing is proud to introduce our all-new unique true high compression racing valve design for the
h22 prelude engine. Super strong one piece design. Made with top notch stainless steel, tested to
withstand over 10,500 rpms (with the correct DHR Valve Springs).
As some of you know, I have dedicated the last 15 years of my life to the Honda racing scene and have
seen a lot of products and shops come and go. I have also, through the years, installed every type
of racing valve made into the cylinder heads I port.
I have seen first hand results of what can happen when you install a valve made with poor grade
materials and that is undercut too thin. In most cases, these valves stretch, flutter, and rock
back and forth until they simply snap off - falling into the engine cylinder at a high rpm. This
is called "dropping a valve". Once you have dropped a valve, the motor is usually garbage. Sleeves
get destroyed, combustion chambers get mangled - there is nothing worse that can happen to an engine.
What I have decided to do is eliminate this issue by building a complete, bullet-proof valve train
that can take the high rpm abuse of a race car and yet can be driven on the street. Maintain true
street drivability with added reliability. I have tested these designs and materials in my very
own race car and have had nothing but success and satisfaction. I am now bringing this same technology
to the public.
Fits all H22 and F20B VTEC engines.
Thank you for your support - DH-Racing
Order yours today for $285 usd + $15 S/H. (+$14 USD for International)
DH-Racing takes great pride in our portwork and guarantee our flow numbers.
Remember, for every 2 CFM increase in flow, approximately 1 HP is gained.
STAGE 1
STAGE 2
For Any Import Head
For B16 & B18C
Bowl Porting
Milling
Stock Valve Job
15 CFM gain
ONLY $500 + S/H!
Full Porting
Milling
Stock Valve Job
295 CFM
ONLY $799 + S/H!
STAGE 3
STAGE 4
For B16 & B18C
For B16 & B18C
Full Comp Port & Polish
Milling
Stock Valve Job
305 CFM
ONLY $999 + S/H!
All of Stage 3
Huge 315 CFM!
ONLY $1299 + S/H!
*** Core required ***
DH-Racing uses a SuperFlow 600
flowbench to guarantee your results.
All tests are performed at the 28" industry standard.
Check out our record setting portwork flow bench results:
Click to enlarge
Feel free to ask about any work you wish to have performed that you don't specifically
see mentioned on the site. DH Racing can now do port work for ANY AND ALL import heads! If it's an import, we'll port it!
