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Manta exhaust
I'm thinking about upgrading the exhaust in my '75 2.0E Manta. I had a nice mandrel bent 2" system but it rusted out (after almost 20 years - I can't complain). I plan to cut the head pipe at the 'Y' and go to 2" diameter. Bob's recommendation is to use at least a 2.25" over-the-axle pipe. Two questions:
1. Where is the best place to make the transition? I would think before the muffler, since there's more clearance there. The muffler outlet is crowded enough as it is, needing to bend immediately up. My concern is whether that will have an adverse effect on the muffler's designed function (high flow with sound reduction).
2. Should the rear muffler be 2.25" diameter also, or would it be better to reduce it back to 2"? The same concerns apply.
O.K., one more question: Any recommendations as to baffled or straight-through mufflers? I imagine the rear will be straight-through, but will it be too noisy with both that way? I have a straight-through Dynomax on my autocross Manta, and with just a pipe out the back, it's just too loud for a street driven car.
All opinions are welcome.
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