Re: 489 exhaust system
I'm running a 3" system with an X pipe all the way out on my 67. It's got a 575HP 468 with a stick.
I love the way it sounds. I like my Musclecar to sound like a Musclecar and since it's a weekend cruiser that only sees about 500-700 miles a year, I'm not overly concerned if it's too loud.
My current muffler set up is 3" Flowmasters but I'm not a huge fan anymore. It just seems like everyone at the cruise night has Flowmasters. When I did a custom exhaust set up on my old car (a BB 69 Camaro) I went with Spintech mufflers. I love the sound and how they're different than most everyone else. Once the weather warms up a bit, I'll be swapping my Flowmaster's for Spintech's.
67 Chevelle SS 138 VIN
468 BB, AFR 265CC aluminum heads, Straub custom hydraulic roller cam, Performer RPM intake, Holley 950 carb, Legend LGT700 5 speed, 12 bolt rear with 3:73 gears, UMI suspension, 4 wheel disc brakes