CAMARO6 - View Single Post - Replacing primary cats with electric cutouts

turbojeep95 · 10-19-2025, 03:07 PM

Been trying to find information regarding putting a set of cutouts in place of the primary cats while keeping the secondary cats with the rest of my factory npp exhaust. Haven't seen this done yet and was hoping my only option wasn't SE long tubes and modifying their x-pipe for a cutout and aftermarket cats. Plus, I was hoping to keep as much of the factory exhaust in place because my area requires a visual inspection for emissions and to reduce cost. It looks like the factory manifolds have a decent tri-y setup and should flow pretty good and to just dump before the cats would make a neat dual purpose daily/track exhaust setup. What you guys think?

10-19-2025, 03:07 PM	#1
turbojeep95 Drives: 17 Camaro lt, 22 Camaro LT1 Join Date: Nov 2016 Location: Beaver, PA Posts: 423 View My Garage	Replacing primary cats with electric cutouts Been trying to find information regarding putting a set of cutouts in place of the primary cats while keeping the secondary cats with the rest of my factory npp exhaust. Haven't seen this done yet and was hoping my only option wasn't SE long tubes and modifying their x-pipe for a cutout and aftermarket cats. Plus, I was hoping to keep as much of the factory exhaust in place because my area requires a visual inspection for emissions and to reduce cost. It looks like the factory manifolds have a decent tri-y setup and should flow pretty good and to just dump before the cats would make a neat dual purpose daily/track exhaust setup. What you guys think?