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Casey Miles · 09-26-2019, 02:50 PM

If you're going to put on an exhaust system, on my 1969 Camaro Z/28 I have a 2.5 inch flowmasters with electric cut outs. The car will run only .15 to .18 slower through the mufflers rather than open headers and they are pretty quiet. Just a recommendation from experience. What I do is run the car with open cutouts, qualify with that number, make a pass with mufflers and dial the car through the mufflers.

Casey Miles
E/S

09-26-2019, 02:50 PM	#14
Casey Miles Senior Member Join Date: Jun 2006 Posts: 692 Likes: 119 Liked 445 Times in 83 Posts	Re: My 1970 Slow Poke Nova Build If you're going to put on an exhaust system, on my 1969 Camaro Z/28 I have a 2.5 inch flowmasters with electric cut outs. The car will run only .15 to .18 slower through the mufflers rather than open headers and they are pretty quiet. Just a recommendation from experience. What I do is run the car with open cutouts, qualify with that number, make a pass with mufflers and dial the car through the mufflers. Casey Miles E/S