Hey All- Surely a common topic but most of the threads are old and not all of the products are still available or commonly available. I want to make my 1987 TR a bit louder. Currently running stock exhaust, cats, etc. In my state I can register it as an antique and therefore don't require emissions. Most of the threads I've reviewed state that the majority of sound is blocked by the pre-cat and cat itself. Therefor bolting on a $5k Capristo exhaust doesn't always result in the sound you may look for. I don't need a ton of sound but I figured that the best bet might be to keep my stock muffler and replace the pre-cat and cat first with Hyperflow High-Flow cat etc. Is a Hyperflow high-flow cat more recommended versus the cheaper "test pipe" cat delete options? What exactly is the "precat?" I can't find that part anywhere online whether by Hyperflow or anyone else Is Hyperflow still even around? I am having a tough time finding any re-sellers of that product line.