IMHO, Magnaflow is good stuff!
I bought a cat back for my old Chevy 5.3, Single exit. L O W
tone at idle, good sound throught the revs with 'minimal' drone (still had some drone, not much though)
'Fit' was about 95%,,, not 'dead on' as far as pipe to muffler allignment, but well within 'tolerance' in regards to being able to tighten the clamps an not have leaks.
I was 'on the fence' between single or dual exhaust before I went with the single,,, Naturally, the fewer connections you have to make, the less chance there is for 'mis-alignment - things to go wrong'... (Score 1 for single)
On a stock of lightly modified motor, Per Magnaflow, a single exhaust will 'perform' better than duals. (Same theory as too big a pipe will be detrimental to scavanging)
How much better than duals? Couldn't say,,,
I think it probably just all boils down to a matter of preference,,,
A dual exhaust looks and sounds GREAT! No doubt about it!
If I had
to do it all over again, I would not hesitate to purchase another MAGNAFLOW.
Cheapest price I found was on E-BAY from Wunder carparts. Their add give you a price on a 'brand name stainless exhaust system'. Magnaflows pricing policy prohibits dealers from listing their product below a certain price, so Wunder carparts 'leaves out' the name of the MFG in their adds to comply with the policy. You can contact Wundercar and they will tell you exactly who makes the system (Magnaflow, usually) what part number it is, and will allow you to submit a 'best offer'
I picked up a 'single exit' cat back on my Chevy for 383 shipped.