Discussion Starter · #1 ·
Hey guys, I’ve been looking into replacing my upstream cats and deleting my downstream cats. I’ve seen some other threads about doing this, but it always seems to end up with the Cali emissions hoopla and some mixed reviews of replacement cats. I’m from Arkansas, and until I see them bringing their machine down my driveway to test my exhaust I’m not gonna worry about how compliant it is. I have just recently got my trans replaced (previous owner didn’t plug in a vacuum hose and it’s sucked dirt since I’ve owned it) and the mechanic said that I had a considerable amount of back pressure, most likely from my cats. That was 2 weeks ago, and just 3 days ago I’ve had the SES light come on, which ended up being a P2A03 code, meaning I have an exhaust leak or one of my O2 sensors are bad. What I wanted to do is have all 4 cats removed, and have them replaced by 2 thunderbolt cats from eBay (I’ve read about them and I plan on using them on other stuff as well, they seem to have a good track record and people like them for a cheap hi-flow), of corse having a new pipe for both sides be fabricated so they’ll bolt to the manifolds. I’d also want to put spacers on the back 2 O2 sensors. Would something like this work or is there a different route that would be better/ cheaper? I figure the two cats are around $100 for both, plus the muffler shop I have in mind does good work for a reasonable price, but I haven’t contacted them yet.