JimMueller

iTrader: (9)

Specifically interested in Grot/QTP style. My Grot 1.75" headers have a ~10.5" collector length, but it's hard to measure the primaries in the car. I found a thread which indicated Lou Gigliotti said the optimum length was 32" but nothing about specific brands.

WILWAXU

iTrader: (6)

to the top

JimMueller

iTrader: (9)

t/t/t

P Mack

iTrader: (6)

Might be easier just to find a picture and use the spacing between the primaries (4.4 inches right?) for scale. Did he say 32" is an optimum length for primaries for a certain rpm, or just in general?