I did test my BTT from last year togheter with L7T5 on sunday. I think the T5 is the same as the BTT at bottom end But, the T5 revs alot higher than my BTT. Both tested with 2096 pipe and 41001 header.
I thnk the BTT would have perfered a longer header with the 2096 pipe.
Yep, but he is not asking about a btt but a keep off.
I have a plus 4btts and I hated it, no torque, no speed, very flat engine.
I now tested a keep off 4 and even tho they share specs, it is a completely different engine, torque is now present, speed is there and the engine is exiting to drive, plus it idles like a dream, I would rather get the keep off 4 but as I always say, this is only my opinion.