Correct exhaust on a C1

[Stewart A.]

My pipes are stuffed holes everywhere.
What are people using to get their cars judged on a full system. I see some companies are selling 409 stainless so magnets will still stick.
Stewy

[John H.]

Re: Correct exhaust on a C1

Stewy -

Stainless exhaust is an automatic 50% standard deduction, whether a magnet sticks or not; an aluminized system will probably outlast us all. A plain carbon steel system (as original) will just rust.