scooter k

iTrader: (22)

Got my dynatech headers in the mail today, but I ordered the ORY pipe and got the ones with converters instead. Should I send them back or just run the cats? Is there any performance gains without cats?

cellulis44

iTrader: (11)

with the cats you'll get better low end. without... little less low end and more top end.

screamingjimmy

i lost low end when i put on my dual exhaust, but i gained more low end when i cut off my cats, my truck now down shifts far less in hills.


Of course, I gain way more high end horse power with both deals!

05GTO6SPEED

iTrader: (3)

is say no cats

Onyx 02

iTrader: (7)

Normally I would say no cats, but I just bought some Dynatechs and noticed that they are definately high flow cats. I'll be testing them out, but will be buying the "off-road" pieces. The one thing that I like about their y-pipe is that you can easily swap from cats to no cats in your driveway!!

Wallywall

Cats alleviate the hassle of emission test problems. No emission test=no cats and vice versa for my opinion.

circusboy

iTrader: (2)

I say cats

MrLM7

I say no cats. They just get clogged over time (even just a little), and they can slow down flow...