Should i get a New Cat or a catback i got the cattman y pipe already what do you guys think just an opinion thats all

 

Catback exhaust frees up airflow much better than the cat. Stock cat is not as restrictive so you’ll probably not even feel the difference.

 

I would leave them alone till they rot off...

Neither will give you much in the power department.

 

If I’m not mistaken headers are like $800 a bit more than a catback, but you’ll definitely get what you pay for. If you don’t feel like spending that much just get the air intake. Combined with your y-pipe you will also see a significant improvement.

 

an aftermarket cat will do virtually NOTHING for you unless you're FI or Nitrous


PS, I have a Frankencar/K&N intake for sale for almost 1/2 of what it would cost new...so if you're interested in some cheap power, let me know!!! (pm me)

 

I'd go with the catback, unless the only exhaust choice you have is a fart can or the crush bend exhaust.

 

If I had to choose, I would get a cat-back system. It will allow more of that free flowing air from your y-pipe to exist the exhaust system faster. If you get a hi-flo cat, your free flowing y-pipe into the cat will just get bottlenecked at the catback (on my maxima I noticed the crushed bends on the OEM cat-back exhaust narrow piping = air restricted) as well as the fact that my new cat-back has .5" wider piping from the cat all the way to the new straight-through muffler. I was told by someone who sells hi flo-cats that they will not offer much additional HP (he stood to gain money from me and recommended I wait) - he told me that unless the cat is clogged, not to force/rush a new cat and just replace it when the OEM cat is dying/clogged. With that said, a nice cat-back system is a lot more $ than just a hi-flo cat but then again you are paying for a lot of piping, a new silencer/muffler, etc. The cat-back addresses a larger section of the exhaust system than just a cat (which isn't that restrictive) which is why I say that with a y-pipe and a new-cat you will still hit a bottle-neck at the cat-back which is a good part of the rear exhaust system. I like my Greddy EVO2 cat-back ($489 for it).

 

You really wont see that much power w/ a catback. The Y pipe gains gave you the biggest bang for the buck already.