Question on CATS

[cfriedman67]

I'm think of building another roadster. My question is do CATS make a noticeable difference in lowering the sound volume or is negated by the road and other noise. On my previous build I had a coyote and Gasn touring pipes. I don't need CATS to become road legal so purely an interest in sound reduction.


Thanks
Craig

[Norm B]

Installed CATS on my car last year for registration requirements in a new province and there was no noticeable change in the sound. I have the FFR stainless steel side pipes that I added augers to in an attempt to make them more quiet.

[cfriedman67]

Thanks Norm.

[Fuel an]

After about 500 miles the fuel smell with no cats started bugging me. I welded these 200 cell bullet cats from PLM right into the J-pipe. No fuel smell now, quieter at idle and cruise, but no difference when on throttle, makes some awesome crackles and pops sound on downshifts and deceleration.

https://privatelabelmfg.com/products/plm-power-driven-high-flow-performance-metallic-catalytic-converter

223484223485223486

[Blitzboy54]

After about 500 miles the fuel smell with no cats started bugging me. I welded these 200 cell bullet cats from PLM right into the J-pipe. No fuel smell now, quieter at idle and cruise, but no difference when on throttle, makes some awesome crackles and pops sound on downshifts and deceleration.

https://privatelabelmfg.com/products/plm-power-driven-high-flow-performance-metallic-catalytic-converter

223484223485223486

This was my experience as well. I had cats on a 306 and a Coyote. Real quiet at idle but full throttle still pretty loud. I find the real benefit being the smell. The snap and pop on downshift is nice.

[cfriedman67]

Thanks Blitzboy and Fuel.