what needs to been done to the cat when installing or bolting on the itr header? what would i need to purchase or do for the fit. i also have the apexi n1 exhaust, if that matters. thanx

 

just go to the nearest muffler shop and they can hook you up cheap, they just have to move the flange back a little....prob $20

 

You'll see better gains removing the restriction of the stock cat and upgrading to a larger unit. Drop Dave over at SMS Products an email ( smsproducts@novacoxmail.com ) and he should be able to make what you need.

 

rainbow muffler does a good job!!!! and there are plenty of locations

 

North Tampa Custom on Nebraska