removing exhaust silencers?

Rodd1s · Post by **Rodd1s** » Thu Jul 17, 2008 5:17 pm

quick question...

are there any performance gains (eg: less restriction) when removing the rear silencer from the exhaust and replacing it with a straight pipe?
not the rear muffler/silencer/backbox... im talking about the silencer in the mid section just after where the second CAT should be.

and what differences/advantages, other than noise, do aftermarket backboxes/muffler give?

Pir0 · Post by **Pir0** » Thu Jul 17, 2008 5:50 pm

From my experiences you do get some gains, as long as you still keep a bit of backpressure.

However my friend had a straight pip from his downpipe to his backbox, and when he put in a centre box it felt a whole lot torquier.

But afaik, the standard downpipe and backbox will create sufficient backpressure for you get gains from taking the centre box out.

Rodd1s · Post by **Rodd1s** » Thu Jul 17, 2008 6:57 pm

i am thinking of replacing the backbox with an after market, less restrictive one further down the line if it can help a bit more... yes, a baked bean can.... 4" exit (cos they are the easiest to get hold of, and at £34 no one's gonna complain).

sheepdizildawg · Post by **sheepdizildawg** » Fri Jul 18, 2008 7:42 pm

I got mine off ebay for $45 shipped, and it sounds really nice