4 Piston Racing 37mm Intake Valve R40 3L at the same price

3L at the same price point depending on your stroke and bore size choice

Dedicated Grudge Race / Street Race

set piston to wall clearance for your application

Not only can they be used in the same manner as a traditional cam gear

5mm specifically)

4 Piston Racing 37mm Intake Valve R40 3L at the same pricePrice is per valve! Introducing the only off the shelf 37mm 50 degree intake valve for your K Series engine. Other aftermarket valve designs actually flow less than the OEM Honda valve of equal size. This valve flat out flows! Up to 7 cfm gain per valve over the same size 45 degree off the shelf valves and 25 cfm more than a stock size 45 degree valve. This valve also features a dished head for reduced weight, 7 grams lighter EACH than the 37mm ST