CAMARO6 - View Single Post - Subjective - Best Exhaust Set up Incl. NPP with no drone

staples87 · 03-14-2019, 08:24 AM

The Borla ATAK catback went on the ZL1 yesterday with the secondary cats still intact. There's a slight rattle when turning, so I'm going to give it a few days of heat cycles then will adjust the clamps / pipes accordingly for clearance. I'm sure this is installation error as the 3" piping is a bit large under the car, so everything needs to align up perfectly.

Thoughts on the sound? It's AGGRESSIVE... but very daily drivable, if need be. Stealth mode sounds like Track mode with the stock NPP (maybe a tad quieter) and this morning's start up (Stealth mode) outside was not bad whatsoever. So far, no complaints from the neighbors.

In terms of drone, there really isn't any. A very minor hum (windows down) from the deepness of the sound, but to be honest, I can hear the tire noise over the exhaust when just cruising. She REALLY opens up over 3,000rpms. I had a group of people last night asking me to rev the car, so when I did, it scared the hell out of them and surprised me too. It was a lot of money, but overall I'm very satisfied and happy with the purchase. My only concern is going to be the Borla NPP valves and how they hold up against rattles, ect.

03-14-2019, 08:24 AM	#22
staples87 Drives: 2017 Camaro ZL1 Join Date: Aug 2018 Location: Bel Air, MD Posts: 319	The Borla ATAK catback went on the ZL1 yesterday with the secondary cats still intact. There's a slight rattle when turning, so I'm going to give it a few days of heat cycles then will adjust the clamps / pipes accordingly for clearance. I'm sure this is installation error as the 3" piping is a bit large under the car, so everything needs to align up perfectly. Thoughts on the sound? It's AGGRESSIVE... but very daily drivable, if need be. Stealth mode sounds like Track mode with the stock NPP (maybe a tad quieter) and this morning's start up (Stealth mode) outside was not bad whatsoever. So far, no complaints from the neighbors. In terms of drone, there really isn't any. A very minor hum (windows down) from the deepness of the sound, but to be honest, I can hear the tire noise over the exhaust when just cruising. She REALLY opens up over 3,000rpms. I had a group of people last night asking me to rev the car, so when I did, it scared the hell out of them and surprised me too. It was a lot of money, but overall I'm very satisfied and happy with the purchase. My only concern is going to be the Borla NPP valves and how they hold up against rattles, ect.