milliemoo

ive noticed on a picture of a prodrive sports cat that the bellmouth has a wall running through the middle.is this any better/worse than the 'wall free' open bellmouths on aftermarket sports cats that im thinking of buying?

bob r

iTrader: (46)

It would hardly give ant noticeable diffeerence in my opinion.
I had a MY03 STI remapped with the usual mods and achieved 336/320 with the Prodrive sports cat d/p.

Cars with similar decatted systems produce slightly less or slightly more but there isn't a noticeable trend.

Stick with legal.

milliemoo

cheers bob

FB Tuning

iTrader: (30)

The idea of the divider it to stop the exhaust gas from the wastegate creating turbulence in the main exhaust stream from the turbine, and hence slowing the gas down.

I suspect any gains from having this would be insignificant.

daz1968

iTrader: (13)

earlier prodrive cats had two pipes blenfing into the downpipe whereas later ones had a bellmouth with a divider, doubt there would be any noticeable difference between them. I have a 2005 sti downpipe on my wrx and would rather have this than a cheaper alternative, it flew through the mot with no issues at all.