vettedean

an interesting read at www.hotrod.com

20 LS1 Intake Manifolds tested

spoiler (small) for avg hp / tq

LS1 stock manifold = 419.9 hp/438.6 tq
LS6 stock manifold = 432.0 hp / 450.9 tq
FAST 90mm = 438.5 hp / 457.0 tq
BBK = 439.2 hp / 458.2 tq

yep, that BBK stuff is junk LOL...