Good time of year to do it, get some outside air down it!
John, tell me when a good time to call will be.
I AM WAITING, but I’m at the vinegar strokes.
[quote=661]Good time of year to do it, get some outside air down it!
John, tell me when a good time to call will be.
I AM WAITING, but I’m at the vinegar strokes. [/quote]
TOO MUCH INFORMATION!!! 
I can’t type for laughing, sorry!
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Lol go on Jim, on which one? Either? [/quote]
“Noticable improvements in torque at lower RPM and frees-up gas flow at high RPM giving improved peak power. Up to 15bhp improvements have been measured when used with our Signature sports catalyst.”
Weird, my 2Bular 4-1 gave minimal gain until cam change point, then it was 12lb/ft gain across the mid range (5k to 8k) and a 25whp gain at the top end (8k).
Having had several manifolds fitted in the past I can vouch most of them made bugger all difference. I had one fitted with a pre/post dyno and ECU remap and it made no difference, waste of 5 hours labour… ask for a dyno to see what difference the 4-1 makes…