KOKISF

Removed the pirmary cats on the exhaust manifold if so did you removed the manifolds to do it? how you didit? was it worth it ? noise ? performance gain ? im sorry i searched but didnt foun anyhting about this or at least what i want to know, I only seen people removing the secondaries!!! i just want to see if with the cats removed the performance is worth it

flowrider

iTrader: (9)

The only folks that have removed the primary cats, that I am aware of, are those running headers. If the primary cats were removed, and the manifolds left in place, you would need to replace (weld in) the removed cats with a down pipe and then weld on the exhaust flange removed from the cats to that down pipe to mate with the exhaust. Seems like a big job to me, and I don't really see the benefit. I have attached a pic of the stock manifolds so you have some idea what I'm talking about.

Lou

MRxSLAYx

I actually prefer removing the primary cats on the stock headers to my current sikky header setup. Send me a Pm and ill help you out with the fairly easy process.

Pqbrown

iTrader: (9)

This is an interesting thought actually, I'd be curious to see what the gains would be. IMO if the manifold had to be removed to do it, seems like it wouldn't be worth all the work involved though.