Is it worth it to gut out the stock up pipe or to just buy a new one? What is the benefit of gutting the stock one?

 

Pros: Its free and it gives the same gains as an aftermarket UP.

Cons: If you dont get every last bit of cat material out you run the risk of having your turbo ingest some of it.

 

why the hell go thru the time consuming pain in the ass to pull the up pipe out to just gut it? esp when they only cost like $125 for a HKS unit.

 

uppipes are cheap, and if you want to be really cheap im sure you can find some on EBAY.

 

its only free to gut it if you have the right tools. personally i would just buy an aftermarket one. New piece and its smaller so if you ever need to take it out you wont have to jack up the engine on the passenger side.

 

Just buy an aftermarket one and save yourself the hassle and time of gutting the stocker.

 

i am buying an aftermarket one but i just wondered why anyone would want to gut the up pipe and if there was any benefit since it was the stock piece.

 

The main reason people gut the stockers is so they look STOCK and (hopefully) wont lead to a voided warranty should a suby tech look at it.

It is a royal pain in the ass to gut them, so aftermarket is definitely the way to go.

btw, I bought an ERZ flex uppipe from ebay for i think 75 shipped or so, included gaskets. Quality is very good on it, only fitment issue is the 2 studs closest to the firewall need to be cut down a little bit as they are too long.

 

i just bought a gruppe-s one which is catless and has no flex. i heard they are pretty good for the money...what do you think?

 

I have the Helix unit and have had no problems with it, it has a flex though. The Gruppe-S seems to be a good product, so good choice and good luck with your new mod.