What's the best cleaning product for getting rid of the exhaust residue on Borla exhaust tips. I haven't seen the fins in a long time;HELP !!!!!

 

On the inside I use a soft (baby) toothbrush and spray-on aluminum wheel cleaner. If there are tough stains I follow it up with Wenol (red tube) and the toothbrush.

On the outside I use Wenol (blue tube) and a cotton towel.

 

Yep, Wenol is good. You can also use Eagle1 NevrDull, or most metal polishes like Blue Magic, Flitz, Mother's etc...

 

I had the Borla cat-back on my 99 Z28 when I had it...

I usually used that chrome polish wadding for the outside... easy enough.

Cleaning between the fins was a PITA, though...

I used to wrap some of the wadding around a pencil or something like that to clean inside...