Supertech Black Nitride Valves for Acura RSX TSX K20 K24 MANLEYPISTONSEJ257 we would suggest contacting Girodisc

we would suggest contacting Girodisc directly over the phone

For 2G build dates before August 3

Fits 2016-2019 GT3 and GT3 RS 991 and 991

(1) Cable Assembly

5 thick bar-and-plate core which has been designed with a strategic core composition to provide optimal reductions in intake temperatures and minimal pressure loss

Supertech Black Nitride Valves for Acura RSX TSX K20 K24 MANLEYPISTONSEJ257 we would suggest contacting GirodiscSupertech black nitride exhaust and intake valves for K20 K24 Acura RSX and TSX. 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. There are a lot