Does a “catback” exhaust remove one or two resonators?

1734 Views 6 Replies 3 Participants Last post by Arith, Nov 3, 2021

2021k3gt

Discussion Starter · Nov 2, 2021

Hello, I’m new to the forum, I’ve popped on here a few times to learn a thing or two but never posted, I got a 21 Kia Forte gt last December with 21k miles on it now, did a few cosmetic mods, subwoofer and tint of course and want to get to the exhaust next, I’ve decided on the Xforce electronic valve exhaust as I’m in a college town with 4 police departments covering 5 miles. Anyways, I’ve heard people mention a secondary resonator on the gt, will this be removed with my main resonator as well when I install the catback? I know this may seem like a dumb question but I’ve never got under the back of the car and looked specifically for mini resonators, someone help me out

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ForteGT2

· #2 · Nov 2, 2021

The Xforce exhaust appears to remove the second Cat, Looks like somewhat of a resonator to replace the center muffler in the mid pipe and has a muffler in the axle-back portion.

Auto part Personal protective equipment Cylinder Metal Pipe

You can buy the Evilla Motorsports cat back no 2nd cat, with no resonator, no muffler, with 1 resonator in either the mid-pipe or axle back, or with 2 resonators:

Automotive exhaust Wood Composite material Nickel Bumper

Factory exhaust:

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ForteGT2

· #3 · Nov 2, 2021

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ForteGT2

· #4 · Nov 2, 2021

I have the Evilla Motorsports cat back exhaust with a Magnaflow resonator replacing the center muffler and Evilla's sport resonator replacing the rear muffler - as long as you drive normally the sound is NOT objectionable. It is only with half throttle-to-WOT that the exhaust gets loud.

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2021k3gt

Discussion Starter · #5 · Nov 3, 2021

ForteGT2 said:
The Xforce exhaust appears to remove the second Cat, Looks like somewhat of a resonator to replace the center muffler in the mid pipe and has a muffler in the axle-back portion.

View attachment 84728

You can buy the Evilla Motorsports cat back no 2nd cat, with no resonator, no muffler, with 1 resonator in either the mid-pipe or axle back, or with 2 resonators:

View attachment 84729

Factory exhaust:

View attachment 84730

ForteGT2 said:
I have the Evilla Motorsports cat back exhaust with a Magnaflow resonator replacing the center muffler and Evilla's sport resonator replacing the rear muffler - as long as you drive normally the sound is NOT objectionable. It is only with half throttle-to-WOT that the exhaust gets loud.

Wow dude, thank you for all the info, the forte exhaust makes sense to me now I just needed to see the diagram, my only question now is where is this mystery primary resonator? And I appreciate the recommendation and envy your setup, I wish I could rip the second cat but I have too many areas that I need to be extra quiet and avoid tickets and harassment from neighbors. Got to go with the variable exhaust.

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ForteGT2

· #6 · Nov 3, 2021

I don't have experience with the X-Force exhaust...looks like this might be a small resonator:

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Arith?

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Arith

· #7 · Nov 3, 2021 (Edited)

ForteGT2 said:
I don't have experience with the X-Force exhaust...looks like this might be a small resonator:

View attachment 84732

Arith?

That's correct. The mid pipe has a mini-resonator that replaces the factory 2nd cat (1st cat is in the dump pipe) and factory resonator. Without a resonator there the car tends to drone so I think that's why Xforce put one there.

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