Engine, Transmission and related drivetrain.
Perfect topic, I'm building my 620 and trying to figure out best choice for exhaust plumbing. I had been thinking of 2" pipe from the header into some kind of muffler, and Monza style tips. Like others on this post, I don't want loud, want the sweet spot of sound and ability to have conversation while on the road. Seems others are happy with a MagnaFlow Quiet muffler. Thanks for the comments posted!
“We can't solve problems by using the same kind of thinking we used when we created them.”
I've been happy with the setup I put on my car. The stock 4-2-1 SSS header into 2.25" mandrel bent. I have a 9" resonator up toward the front and a Magnaflow 4x6 Oval muffler. To be fair, compared to the 1.75" exhaust that was on it, I did think it was very loud at first. It doesn't bother me anymore. There is next to no clearance through the rear crossmember though.