66 exhaust routing

[Agv63]

I have a 455 pontiac in my 63, 2.5" pipes and going outside of the frame, one straight thru big size glass packed muffler, and dumps about 6" before the rear wheels, it is actually not loud, good sound just sounds a bit wonky as i must still add a crossover tube.
Could run it the same and add more mufflers or just extend pipes on outside of frame. Depending your wheel size it should fit. Will add some pics i took from internet.. not my truck but neatly done.

Cheers.
Adriaan.

[WorldsCrappiestTruck]

With a rear tank, lowered and wanting a rear-exit, it was a challenge. Add to that wanting a relatively quiet truck.

I have an LS, Speed Engineering headers, to 8” Flowmaster universal cats, then a 2.5” stainless system from there. The pipes were a kit, and elbows/45’s etc from Amazon that I cut & welded sections together to route accordingly. The mufflers were Jones Exhaust from summit which I LOVE. They are super quiet at idle, have a nice tone going down the road with zero drone, but blatt loudly at WOT.

Fabbing all this up was a challenge but I’m very pleased with the result.

[rbruno68]

Originally Posted by WorldsCrappiestTruck

With a rear tank, lowered and wanting a rear-exit, it was a challenge. Add to that wanting a relatively quiet truck.

I have an LS, Speed Engineering headers, to 8” Flowmaster universal cats, then a 2.5” stainless system from there. The pipes were a kit, and elbows/45’s etc from Amazon that I cut & welded sections together to route accordingly. The mufflers were Jones Exhaust from summit which I LOVE. They are super quiet at idle, have a nice tone going down the road with zero drone, but blatt loudly at WOT.

Fabbing all this up was a challenge but I’m very pleased with the result.

That is a great job on running that exhaust. I took the easy way out and dumped in front of the axle.
Rob

[WorldsCrappiestTruck]

Originally Posted by rbruno68

That is a great job on running that exhaust. I took the easy way out and dumped in front of the axle.
Rob

Thanks. I considered it but put dumping in front of the rear axle, or in front of the rear tires as an absolute worst-case-scenario bailOut option, if I simply couldn’t fit over under and around the trailing arms, axle, panhard bar and tank.

Yes, there are a lot of added degrees of resistance with all the bends….and I’m sure the theorists decree I’ve lost HP, but that wasn’t the goal.

Goal was quiet-ish, rear-dump behind the rear tires, and no smell (hence the cats). All three boxes were checked with this setup.