The key word is UP TO 13hp. Expect closer to 1 than 13.Thank for the replies. I did a little digging and found the performance numbers on the GM Borla exhaust.
Give your Silverado 1500 ZR2 6.2L engine a throaty purr with this Performance Cat-back Exhaust System from Chevrolet. This Genuine Chevrolet Accessories Performance Exhaust is designed specifically for the Silverado 1500 ZR2 which is limited to a Short Wheel Base (SWB) model; Crew Cab with Short Bed [5'-8"]. This Performance Exhaust kit is made from aircraft grade T-304 stainless steel with large front 3.5-inch and rear split 2.75-inch outer-diameter 304 stainless-steel pipes. This system offers up to a [40 percent reduction in back pressure at 335 g/s at 600 degrees C], up to a 13-hp improvement at 5,600 rpm and up to 8 additional pound-feet of torque at 4,100 rpm over the production exhaust system.
Any drone at highway speeds?Mine didn't have a Borla on it from the factory, and I wasn't going to pay the $1900 for the Borla cat-back system from GM. I did get a Borla Atak muffler for $300 on Amazon and my local muffler shop put it on. OH BOY! what sound! Love it.
What's a fair price for a local guy to do the install on that? and do they remove the "flap" that restricts flow as well? Sorry, I am not a mechanical guy, so I hope that last question made senseMine didn't have a Borla on it from the factory, and I wasn't going to pay the $1900 for the Borla cat-back system from GM. I did get a Borla Atak muffler for $300 on Amazon and my local muffler shop put it on. OH BOY! what sound! Love it.
I ordered this from Amazon and had it installed yesterday. Really like it... it's subdued when cruising but bold when you're getting into the throttle. I see a decline in my gas mileage coming...I used the Borla Atak crate muffler #400844
It was not factory installed, it was installed by the dealer. No Borla exhaust systems are installed at the factory. It can be ordered with the truck but they are all shipped separate from the truck and installed by the ordering dealer.I can confirm that my zr2 I purchased on September 9th, came with the Borla exhaust from the Factory.