What type of exhaust does your 273 have??? show some photos!!!

mvh said

What are you driving? If you have a 67 Barracuda, you'll have a hell of a time getting a second pipe over the axle any larger than 2 inches. My exhaust guy thought he could run 2.5", but it bangs against the spring when cornering, and has zero clearance on the tank side.

When they say the single exhaust flows better, that's with that huge "Formula S" resonator, which costs as much as a whole exhaust system itself.

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Funny story. Back in the 90's back in rural Missouri, one day I somehow stumbled on to a guy that had a really big old Mo. barn, and the walls had shelves way up all 4 sides, full of NOS mufflers. He had probably 25-30 of the Formula S resonators and even hemi muifflers. Back then, those resonators were unobtainium and no one repoped them (which would not have been hard). I bought them all and sold them for like $150 each, with no internet. People about choked when I priced them. Most were thrilled to get one.