[starfire039]

I can't say. I have no RR results to back up. It did change the noise though. I thought it added a bit of oomph when the engine was under stress (particularly on the motorway), but it could be placebo. I watched it being made, and it did appear to bend at less of an extreme angle than the standard downpipe so I can only imagine this improves airflow.

Something of interest is that I got the downpipe made so that the catalytic converter is inbetween a couple of flanges. You could get a straight through pipe made up to replace the cat (the cat is on bolts, and can just be unscrewed and a new pipe with flanges put in place). This was intended for MOT time when I got the decat, making it easy to replace the cat with a decat and vice versa, but as said I never got the pipe made up. I was quoted ?70 for the straight through pipe from Powerflow in Brighton, you could shop around.

HTH