headers are a pain!
2 weeks ago I bought a used set of MAC equal length headers for $25 bucks! Crome and in good cond. Well 2 weeks later I am still trying to install them. I got the drivers side in ok, but the passenger side header tubing doesn't line up right with the exaust ports in the head. I've been using a pry bar trying to get some luck threading the bolts in. I think I'm going to have the car towed into the shop I work at and fixed. Anyone know how much HP gain i should get with these headers? My car is bone stock besides a K&N air filter.
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90 Mustang GT. K&N air filter, completely stock. Purchased at 107,000 for $3500
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