Supertech/Apocalypse 2V valve springs for stock retainers (drop-in)

For Ford Modular 4.6L and 5.4L engines with PI 2v heads.  These have been used with 20psi without any issues.  We recommend these for most applications not seeing over 30psi.  These...

Supertech / Apocalypse 4v 4.6/5.4 .5mm oversize stainless intake valves

This includes 16, 37.5mm  intake for all 4.6 and 5.4 4v engines expect for those with Cobra R and GT/GT500 heads.  These are stock length for stock base circle camshafts and accept the 3...