Supertech Black Nitride Valves for Honda D-Series NON-VTEC Select::Intake 29.0mm (1 Single) (HIVN-1003-1) the OEM jet pump becomes

the OEM jet pump becomes too restrictive creating unwanted back pressure in the FPR return line causing excessive fuel rail pressure

(1) 400-991 Install Kit

We then took that data and tested in the harshest conditions by racing the Baja 1000 in Mexico and also throughout the sand dunes of the Middle East all to provide you with best air filter that money can buy

1:1 for EVO Piston Type: Dish Weight: 300 Grams Ring Set: 46865‑4

Supertech Black Nitride Valves for Honda D-Series NON-VTEC Select::Intake 29.0mm (1 Single) (HIVN-1003-1) the OEM jet pump becomesSupertech black nitride exhaust and intake valves for NON VTEC D Series engines. These valves are available in various sizes to match your head diameter. Sold as a set of 8 or individually as needed. Please do all your research and consult your engine builder if necessary! Black nitride valves are made from one piece forged stainless steel then go through a special hardening process to lessen the friction between the valve and guide. Vehicle Fitment: