Pistons come with valve reliefs to fit SR20DET and VET heads, compression is roughly .7 points higher when using VET heads
We offer these pistons in 86.0, 86.5, 87.0 bore and compression rations in 9.0:1 (9.7vet) and 10:1 (10.7 vet)
for customs pistons email us at sales@traumpistons.com or WhatsApp text at +1 (424) 448-2875