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I have a complete 3 1/2" exhaust with X-pipe and Spintech Sportsman Street XL mufflers.
The car is pretty quiet at idle and cruising, but very loud a full throttle.
When I ordered the mufflers from Spintech He said he would be suprised if the engine lost any power at all. Maybe 10-15hp at most.
That worked for me. I can actually listen to my radio while driving.

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Now that`s what I needed to hear.....not sure I`m willing to give up ANY hp actually especially since some have reported NO losses at the track from muffs to uncorked w/bullets or other muffs.

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I have a complete 3 1/2" exhaust with X-pipe and Spintech Sportsman Street XL mufflers.
The car is pretty quiet at idle and cruising, but very loud a full throttle.
When I ordered the mufflers from Spintech He said he would be suprised if the engine lost any power at all. Maybe 10-15hp at most.
That worked for me. I can actually listen to my radio while driving.

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Now that`s what I needed to hear.....not sure I`m willing to give up ANY hp actually especially since some have reported NO losses at the track from muffs to uncorked w/bullets or other muffs.

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If you want zero HP loss then the Super Stock race quiets are what you want.They are advertised at 95db. I was going to get those, but Spintech said not to for street driving.(Too loud)
My mufflers are 85db. I bracket race so I could care less if my car is a tenth slower.