Well I decided that the cats needed to go and replaced them with two pieces of 2 1/2 this weekend. Now the exhaust sounds just how I want it too other than this annoying popping sound at about 2500 rpms. I'm running a single in 3in flowmaster with duel 2 1/2's out the back. What is causing this sound? and what can I do to solve it? I'm thinking about going to a magnaflow muffler or a hooker aero chamber or even doing a single bullet upstream of the muffler but I want to know that it will get rid of this popping!!!! Let me know what you guys think

 

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3" in and out, should calm that popping down some.

 

Time for a tune. Handjob probally won't cut it either.

 

I already have a tune, I'm running a hair rich but nothing major.

 

Yeah, I'd say open the pipe diameter up a little bit and throw you a straight thru muffler on there and that should kill the popping off.

 

the popping is from no cats and youll need to adjust the tune properly to conpensate for it...nothing major

 

so the popping is because my tune is to rich? So I just need to lean it out, correct?

 

its always guna pop a little unless you get a good resinator in there. it needs to be tuned a lil after dumping the cats though

 

Precisely! Chances are you are dumping extra fuel into your exhaust, this causes the popping sometimes. Hence why F-Bodies heard it when they went ORY. With a proper tune (or re-adjusted tune), it will minimize it.

 

my truck did the same thing, I had a Flowmaster delta flow, and it was pretty bad around 2500 under normal driving, I put on a Hooker Aerochamber and it was a little worse! I tried having the tune adjusted, just mail order, and could not get rid of the noise. It drove me crazy, so crazy that I went and spent 500 bucks on a set of Pacesetter long tubes and custom y pipe. That got rid of it. Now the truck sounds great. I still have the exhaust in the factory configuriation, y pipe into a single muffler with a single in single out at stock location. Good luck!!