the_big_1

iTrader: (1)

Hi All,

If I get a prodrive sports CAT exhaust, the two parts with both CATS fitted and fit it to my 2.5 2006 STI will I:

Need the car re-mapped?
Have any benifit over the standard thats fitted?

Ved

Yes and yes. It'll mean air is flowing far better than a standard cat so you should really have your car mapped to accommodate this new part. The PD one is close to decat for performance. The only benefit is the potential for extra power but if you want to go above 340 then you'll also need a new backbox, fuel pump and a better air filter like a green cotton or group-n from TSL

the_big_1

iTrader: (1)

Hi,

I have a Ninja II back box and deresonater center parts fitted now and K&N filter.
Anything around the 320BHP is fine for me.