For insurance purposes, what power increase would there be?


A_E

 

Zero? I'm sure you could get a dyno plot to show less than standard bhp with a backbox if you try hard enough. They don't add much alone anyway, but some claim up to 10bhp!

Try getting covered on "exhaust" and then power increase up to 10% then fit a downpipe and a centre also.

http://dyno.scoobynet.co.uk/psuk/jeremy_conlon.htm