Just purchased a 2002 impreza wrx sti prodrive, it has a feral racing t304 exhaust system, everytime i change gear or slow down it pops and bangs, Just wondering if anyone can tell me what it causing the noises ? and what would i need to replace to get rid of the noises ?

 

elo mate welcome to the forum for the exhaust to pop and bang then its decated so you need to get some cats back on it

 

A lot of people have remaps to achieve that

 

BOV Dump Valves with de-cat normally cause that mate, dump valve can cause very slight over fuelling, nothing to worry about really, I like the pops and bangs

 

Hi, I am a newbie so bear with me. Santa has delivered me an 2002 sti prodrive and my car also has a Feral t304 exhaust on. The popping of the exhaust is really quite loud on mine and caused a little old man to drop the books he was carrying as i drove past him on my 1st trip out !
Can anyone tell me (in simple terms as i am female) whether the car originally had 2 cats and both would have been removed to achieve the popping or just one and is this an expensive job ?
I do like the pops but am also concerned that this will get me a pull from the plods too

 

Yes two cats on the STI 2002 as standard, and do you mean re-fitting them ?

No not that expensive to do, BUT you'd have to source them and then the ecu may need re-mapping to suit the more restrictive exhaust. Just to be safe.

And welcome to the Prodrive "club".

HTH

dunx

 

The 2002 Prodrive STI.. the loveliest Impreza Ever.

Just so you know..

 

another 2002 sti prodrive here

 

Thanks for the help and the welcome. I cant believe driving is so much fun !
i have posted a photo as i cant decide whether to keep the carbon fibre spoiler as it is or have it sprayed to match the car ?

 

I'd get the original prodrive one back on in the original colour myself - or you could swap your car for mine! I want a prodrive!