id say cat converter bc mine does it, only mine starts just above 2000 RPM and goes away as i get btwn 2.5k and 3k RPM, and i know that mine is the cat bc ive had trouble with the cat since i got the truck

 

Mines seems to go sometimes, then sometimes it doesn't It Will usally go after 3,000 or more and on. Annoying at times though.

 

yeh i need to replace my cat, its gone sour. should i replace my o2 sensor while im under there?

 

hmmmm i would wait gna cost 50-100 bucks and it could be good, know what i mean? do the cat then drive thru a couple tanks

 

yeh but th cats more expensive and im not 100% sure if its defected....wat should i do?

 

how do you know your cats shot? is it rattleing? or do you think its plugged. either way, a cat is like $75 and a O2 sensor is $70. and an O2 sensor is alot easier to replace.

 

really? a cat is that cheap? no freakin way...got any links for that cuz mines rattlin and the intake end is significantly hotter than th outlet end....also how much would a hi flo cat cost me? somwhere aroun 150 huh?

 

I bought my universal magnaflow high flow cat for $75. my cat was rattling when I bought my truck, so I thought I may as well just do a whole new dual exhaust while I was at it but the guy that did my exhaust got all my stuff for me cheap. I dont know where he gets them though.

 

yeh i wanna shorten my exhaust..hav it exit right befor th axle with a turn dow.i got a somewat new flowmaster 40 muffler to put on too. so u got the cat from the guy or off the internet or some shop?

 

I got my cat from the guy.

I got a high flow cat, magnaflow 18" muffler 1 in 2 out. two magnaflow 3.5" stainless tips, and 2.5" custom bentstainless piping all for $600 cash.

he did the 88 for $100 just a cheap cat, and a flowmaster 40 I already had kickin around.