Hi-flow cat and Resonator

[denniegst]

whats the difference between the two? Im getting a R&D exhaust and is thinking about getting a high flow cat and cutting off the 2.5 end part of the exhaust and welding on a 3" resonator. What your opinion on this?

 

[anubis]

that depends on who you're getting your parts from... some people may try to sell you a resonator and claim that it's a high flow catalytic converter.

a high-flow cat is just a catalytic converter that is less restrictive to the exhaust flow.

a resonator is a sound muffler or sound modifier. they either help cancel noise or modify the noise. that all depends on the brand, size, style, and shape of the resonator.

 

[VanIsleDSM]

A cat is for reducing emissions, it's illegal not to have one on the street.. a resonator is to lower the tone of your exhaust, they mellow it out a bit... a cat, resonator, and straight through muffler will give a nice exhaust note, quiet, and very nice..

edit: I was beaten.

 

[JayRolla]

it's illegal not to have one on the street

It depends on where you live.

 

[xveganxcowboyx]

It depends on where you live.

It is illegal to run without a cat. The only difference between states is who checks for them and enforces the laws or not.

 

[anubis]

It depends on where you live.

i'm pretty sure you need a catalytic converter in all 50 states for any road going car/truck. the only exception is cars that were originally produced without a catalytic converter (i think it's cars made before 1975. i could be wrong.). it may be easier to get away with in states where they don't do inspections (like michigan) but it's still against the law - as far as i know.

 

[JayRolla]

Yea I think you guys are right. When I had my 86 Bronco the muffler shop said it was not illegal to go straight pipes since we dont have emissions in the town I was doing it at.