I’m curious how the SPD downpipes, resonator, and catback hold up over time. Does anyone who’s had it for a little while now have any feedback on them?

 

super great company to deal with with American made stuff. I've run a full SPD system for the past 15k boosted miles and making roughly 900hp. no complaints here. Greg is a very stand up guy...

 

Is there a power level where stock cats can't be expected to last?

 

I put 4k miles on my stock cats with a 3.750 pulley and when I removed them I found signs of them already coming apart. after forum member rayovac blew his motor, I made it a priority to get rid of the cats. too my cylinder temp with the factory cats.

 

I just noticed SPD no longer offers offroad y-pipes.. Wonder if they will start offering GESi cats similar to competitors.