just wondering which is the best fast flow cat to get for my 2003 blobeye wrx ,as looking to get remapped and is a 255 walbro fuel and uprated air filter all i need ,or will i need uprated plugs as well..

cheers

 

plugs always a safe bet, prob not needed but for £50 quid u cant go wrong and it safe gaurds an aweful lot of things

 

Just make sure you've also removed the first cat in the up pipe and the 3rd cat after the down pipe for maximum gains for the map. O and I'd look at the Ninja fast flow downpipe with 100 cell sports cat. Scoobyworld have them on offer at the mo to.

 

I've used a H&S 3" downpipe sports cat on my 2009 hatch.