Why not remove the centre silencer instead of the cat?

[daddycool]

i was thinking about this the other day.
we remove the cat because it's a restriction. is the centre silencer also restrictive? if so, why not remove this instead of the cat? would be less hassle at mot time.

genuine question, i'm sure the answer is out there...
and it's probably that the cat is more restrictive than the silencer

 

[Dave..]

Have a look down a catalytic converter, and then a scilencer

Also, remove both FTW. /y0z

 

[daddycool]

i tried to find pics of a silencer the other day and read up about how it worked, could only find images of back boxes though. i guess then yes, the silencer is pretty much straight through. seen a cat before, hmm crunchie bar

 

[ipodsandguns]

most aftermarket systems remove the centre box. Also if you want to do it your self shopping out the centre box and making up a pipe aint easy.

 

[daddycool]

so is removing the centre section purely a mod for noise, or does it breathe even easier?

 

[Kam.]

The middle silencers tend to be baffled so do restrict flow. Not as much as a catalytic converter. Our Lupo custom manifold gained 10bhp combined with a sports cat compared to a standard whereas we gained only a couple of bhp with the straight through exhaust.