Jan 8, 2015 #41 C CaptainRAVE Active Member Joined Jan 7, 2015 Messages 297 Car SLK55 AMG Diamond White BenzedUP said: You tend to loose engine back pressure on de-cats. I personally won't do it, look into doing the Kleemann headers, you gain hp and will sound amazing too. As far as I know all R171 SLK55s sound the same 2005-2011 they share exactly the same exhaust set up. Click to expand... Xpipe plus 2nd cat delete should gain a little bhp. Regardless, it sounds absolutely incredible (how a V8 should) and is the best thing I ever did on the car.
BenzedUP said: You tend to loose engine back pressure on de-cats. I personally won't do it, look into doing the Kleemann headers, you gain hp and will sound amazing too. As far as I know all R171 SLK55s sound the same 2005-2011 they share exactly the same exhaust set up. Click to expand... Xpipe plus 2nd cat delete should gain a little bhp. Regardless, it sounds absolutely incredible (how a V8 should) and is the best thing I ever did on the car.
