Im going to buy the carsound car for my 95 gsr, I should order the one the one with the 2.25 collector right? I have a dc sports catback and a greddy header. Do they come with the spot for the o2 sensor?

 

2" inlet, 2.25" outlet

You don't need an o2 sensor bung since the ODB1 tegs only had an O2 sensor in the header.

 

I think you have it mixed up. My o2 sensor is on top of my cat not on the header and yes it is obd1. So does it come with the o2 sensor bung or do I have to put it in?

 

How about for a 94 RS with DC header and exh? Is the Carsound High Flow Cats bolt ons or welding takes place?

 

CJS you have no O2 sensor in your header? And one in your cat?

According to my shop manual, and my experiance underneith odb1 tegs..I don't have it mixed up, that is really strange.

Carsound cats from ipsracing.com bolt on. They come with or without o2 sensor bungs.

DC Header has a 2" collector, and DC exhaust is a 2.25" exhaust system so you would get the same cat Meguel.