
PROX - Steel Intake Valve Conversion Kit (manufacturer part number: 28.SIS6334-2) designed to replace the original titanium valves with a set of steel valves. Ideal for riders performing engine rebuilds on their off-road machines who are looking for a reliable, easy-to-install, and economical solution.
PROX is recognized in the motocross/enduro world for the quality of its engine parts, with a manufacturing level comparable to original equipment. This kit is aimed at owners of Cross machines looking to renew their cylinder head: installation during guide replacement, seat machining, or general overhaul. It is particularly suitable for popular 250 cc models such as the KTM 250 EXC-F SIX DAYS (2016), the HUSQVARNA FE 250 (2016), and the HUSABERG FE 250 (2014).
It is recommended to have the installation performed by a professional or experienced mechanic to check clearances, timing, and adjust the influence of the new valve train on the timing system. Product delivered without unverified performance claims, solely a robust solution to restore your engine.