Use your car as a flowbench - measure exhaust backpressure ... (e.g. 180° or more), press-bending (as created by normal exhaust workshop benders) does not normally cause much measurable restriction.

meaning they're specially designed to fit your car. In the past, welding gear, a tubing bender, and a chop saw would've been a requirement, but these days most exhaust systems are bolt-on for easy ...

There's a multitude of U- and J-bend sizes available these days, so you don't need the aid of an expensive tubing bender like ... between making an exhaust for a complete car and doing one on ...

This is why, when swapping to a larger engine or simply upgrading your exhaust system, it's crucial to select the appropriate size pipes for the best results. And, if your running vehicle smells ...