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      01-09-2016, 03:39 AM   #44
Beedub
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Drives: 2007 Z4 M roadster vt2-500
Join Date: Sep 2007
Location: UK

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definitely, pokey had a picture of his 100 CELL cats Vs the stock CATs and the CPI difference was HUGE, not to mention the pipe diameter was larger with a race cat that was 1/4 of the size of stock, its got to be a close to going De-cat without going the full hog, but you won't believe how much extra noise they make this the stock cats out.

It surely has to lower EGTs by some way too.

Don't forget to look at your spark plugs if they haven't been done recently.
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