rally2247

iTrader: (1)

So, I've had the Trans Am with the G1 cam for about 3 years now. It hasn't been my daily driver, but I'm reaching the point that I'm getting very annoyed and frankly sick of the exhaust smell.

Now, I'm wondering if I should just install one 3 inch high flow cat after the 3" collector or should I install 2 cat converters. The 2.5" inch ones before the collector?

Will I be ok with one single cat or should I get two?

Thanks......

Grimes

iTrader: (3)

i'd go with two smaller ones

rally2247

iTrader: (1)

Hmmm. I guess I'll go with two it's just that they're so damn expensive. Any particular reason I should go with two?

Jassick

iTrader: (1)

I'm guessing two would be better for flow purposes. assuming they both have the same resistance, the dual 2.5's should flow better than the single 3.

Grimes

iTrader: (3)

That's the reasoning I was going with. Sorry I wasn't more descriptive. Which ones are you thinking of purchasing?

rally2247

iTrader: (1)

Well, I'm not really sure. Ones that aren't too expensive. :-) Possibly the random tech cats. Those seem very common around here.

hlaalu

iTrader: (3)

how do you figure that? my logic is one bigger cat would be less restrictive than 2 smaller cats.

anyways if you dont need to worry about smog then i don't think it really matters but if you do have to worry about smog then you need them as close to the engine as possible.

rally2247

iTrader: (1)

So, fellows....what's the outcome? One works fine or two?

Actually, does anybody actually run just a single one?

02silvaZ

iTrader: (12)

i would like to know this too

Grimes

iTrader: (3)

It really depends on the flow numbers of the actual cat you're using. But most of the time, from what others have posted up here, using 2 is better.

rally2247

iTrader: (1)

Damn...I really wanted to save money on this one and get one single one. But, regardless. I suppose I'll go with 2 cats then.

SOMbitch

iTrader: (8)

My cats flow over 600cfm each and still cost horsepower (magnaflow 3" metallic cores) You will never find a single that can flow 1200. Get two.

dshag

iTrader: (1)

go with one and just put a cutout infront of it, cheap and wont cost hp when its open, im not sure how it would do emissions wise though

Arctic2002ss

I have 2 cats on mine and made the numbers in my sig. Even the shop was impressed by the numbers with cats. They are Magnaflow, BTW. I don't think I would have hit that with 1.