i have a stock 2003 gmc seirra, and it hasn't been running right. i took it in and they said the cats are clogged so i told them not to fix it cause i have replaced y pipes on my camaro and h pipes on my mustang. i was wondering, would it be best to order a new y pipe or just order new cats. and what sponsor would have the best prices, i checked through them but couldn't find any y pipes for stock exhaust manifolds

 

sounds like a good time to upgrade to longtubes and a ypipe.

 

wish i could, but all my money is going towards the camaro and motocross. plus i need this truck as just a stock daily driver that is gunna be dependable

 

Cheapest route would be to just empty the cats. Then you would need a tune to disable the ses light for the rear O2 sensors.

 

we thought of that, but my mustang had an off road h pipe and it always had a gassy smell, and we are not sure if we want the smell, we found a couple stock replacements for $310. does this sound like a good deal?

 

Or you could just buy the $500 longtubes and ory for a little bit more.

And no that doesn't sound cheap. Get some high flow magnaflows cats. I have a set I'll sell ya for $100 shipped.

 

are they straight weld in replacements???

 

Yup, used, but in great condition. I had them put on my truck after I experienced the same problem you had.

 

i'll check with my dad, its his truck and im just tryin to help him out

 

summit racing sells a bolt on y pipe for under $200 shipped.