Catalytic converters, noise, flow, etc...

[DamnYankee]

Not sure where to start with this...

I have the Spin Tech muffler. It's one of the best flowing mufflers you can get, and has a decent sound. Not a deep rumble like I was hoping for, but I can live with it. When I got it installed I had them leave the cats off. Only it was way too rattly and annoying sounding for my taste. So I had them weld them back in. But, when they put them in, I' pretty sure I noticed a loss in power.

So I'm trying to think of a solution. Is the solution to eliminate the cats and maybe use a different muffler - or is it going to be rattly regardless if I don't have cats? I know you can hollow out the cats and Allen can delete them so it will pass inspection. But if I do that, again, will they still be rattly?

Any solutions I'm not thinking of?

[graysilverado5.3]

I have a borla on mine, and when i took off the cats it sounded louder and then when you give it gas it makes more noise. It's weird, i don't know how to explain it. I give it gas, and you hear the muffler but when the muffler would stop being loud originally, after the inital sound.it makes a louder sound without the cats. Plus, taking out the cats, give you a constent smell of gas hehe. My girlfriend has to hold her nose before she gets in my truck, lol

[RedHeartbeat]

I just bought two new magnaflow cats and a 3" dual in/dual out muffler. Hopefully the cats don't kill my power. I have to pass a visual inspection so the cats are a must and I am doing my best to stay "green".

[DamnYankee]

I'm with you Greg, I want to stay 'legal'. I just hate to have something that's slowing me down. Especially if there are two of them.


How about the FAST intakes...I've seen them but haven't seen pricing...

[RedHeartbeat]

The best price I've seen on the FAST intakes is about $750 on Ebay. You have to convert the intake to an Fbody type intake to use it. I don't think FAST has a truck version.