May 28, 2016 at 10:47 am #12038
I will be doing a full dual pipe system on my Cutlass rather than stock and am looking at the 18″Super HP 2 mufflers from Flowmaster. They are very compact, stainless, are insulated and run very cool on the outside, and are often used in close mounting situations according to Flowmaster.. Anyone have any feedback on them?May 29, 2016 at 8:38 am #12039
Here’s a dwg of the muffler.Also available in 12″ length but I think that would be too loud.
You must be logged in to access attached files.May 31, 2016 at 7:56 am #12042joe_padavanoParticipant
I considered true duals and chose not to go that way due to the loss of ground clearance. The 61-63 cars have a floor pan with an offset tunnel to allow the single exhaust pipe to fit next to the driveshaft. I found that the Walker 2.5″ cat-back pipe for a fourth-gen F-body fits almost exactly – I had to make some minor tweaks on the bend over the axle. I fabricated a front section that mated to the stock Y-pipe. If an Olds 455 breaths fine with two 2.5″ pipes, a 215 will have more than enough airflow with a single 2.5″ pipe. I also wanted a muffler that fit in the stock location. I finally found a Magnaflow for a third-gen F-body that had a single 2.5″ inlet and two 2.5″ outlets that fit behind the rear axle. Sounds awesome, especially over 3000 RPM.
You must be logged in to access attached files.May 31, 2016 at 1:01 pm #12047
Thanks Joe, looks like a good solution. I have an additional problem with ground clearance since we are putting a TH 200 in and have modified the original rear mount which has resulted in lowering it. Haven’t done ground clearance checks yet but may need to fab a custom trans rear mount that gets back up tight to the floor to allow adequate clearance for a pipe or pipes going under it.
Why did you not go with the available exhaust kit from Waldron’s?June 1, 2016 at 10:01 am #12049joe_padavanoParticipant
Why did you not go with the available exhaust kit from Waldron’s?
Because their system is only a 2″ pipe. Mine is 2.5″. That’s over a 50% increase in flow area. Plus, I wanted an aggressive muffler, not stock-sounding. Plus, I enjoy fabricating stuff like this.June 1, 2016 at 10:08 am #12050
Got it. Similar reason to why I’m looking at other options too I guess. Was hoping it wasn’t fit/quality of Waldron’s.
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