M1 Tunnel Ram Top Plenum Volume Reduction with Photos
MOPARMAGA said
Awesome, thank you
Click to expand...
On a big block I think your head port is about 6 and I bet the tunnel ram is 7.5-7.75? That 12.5 length gives a great 4th harmonic boost 5500-6200 but probably falls off a little early since you never get into the 3rd harmonic 7000-8000 boost.
Print