Increased power? Maybe.

I have owned 4 of these, model 141-25000, for my 2001gmc C3, they were ok for a while but long term results are horrible. The internals (bricks?) break loose and then the infamous death rattle. Thought I would not give up on them but after 4 of these now they eventually fail with loose internals that will transmit the rattle through your vehicle. I do not drive off-road so I expected these to last the lifetime of the truck. Tried using the warranty on them but manufacturer would not replace even though they have a warranty card. After a lot of money spent and multiple tries hoping these would perform I am greatly disappointed. Bottom line, Junk.

Increased flow, no initial problems, long-term durability was good. Slightly louder than my stock converters. Has lasted 10 years and 70,000 miles. Need I say more?

Inlet/outlet size was oversized for my stock sized pipes. Good fitment for those with upgraded full exhaust, but not for stock. Not an issue for a competent exhaust shop to deal with.

Purchased ten years ago in 2001 for my 1998 chevy silverado. I don't remember how much I paid ten years ago. Replaced factory dual cats on 350 vortec. Had at least a couple instances for check engine lights of converter efficiency codes for being below threshold. This is over the course of 70,000 miles. I understand this is the nature of hi-flow converters and they have been great over the last decade. Still no sign of rust (except welds) and they still flow well. Just started getting a continual P0420 code on bank 1, so they may be about used up. Will definitely consider buying again. Buy if you want more performance than stock converter.

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performance mufflers

POWER, IMPROVED MPG, LIGHT-WEIGHT.

SELF-INSTALL(of course).

I bought this Down-Pipe #142-30027
for my 2002 Monte Carlo SS, 3.8L N/A. It made a tremendous increase in both HP & TQ! 3yrs. now and counting, no trouble code, very little rust, better MPG!

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Stock Down-Pipe & CAT, ZZP Down-Pipe & CAT(second-hand).

power gains

rattling from heat plates.

this thing has great power gains but only after 1500 miles the heatshields broke loose and it rattles like a mother trucker. for the price paid it shouldnt be doing this, it ridiculous.

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stock

Looks better than the rusty stocker

Much less durable than stock Heat shields rust away Particulate gets loose inside with normal driving

I first purchased the product because of the gains I read about and the fact that it added little to no noise. I bought one for my 99 Maxima and my 96 Civic. Before the RT I had a Carsound Cat on my Maxima which worked fine but the RT was supposed to add 5hp on top of that so I gave it a try. I have had to replace the Cat twice on my Civic and once on my Maxima in the last 2 years. Eventually the heatshields get loose and rattle and they have to be removed. The reason I replaced them was because of a horrible rattle from inside of the cats. The particulate gets loose and rattles around. I got sick of replacing my cat on the civic and went back to stock. I don't feel like replacing it again in 6 mos to a year. On the upside the warranty process was fairly painless. Unless you like paying someone $40.00 a time to replace your cat or enjoy doing your own exhaust work, stay with the stock cat and upgrade the exhaust and or header/y-pipe for more performance.

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Stock Carsound Cat - No problems

Ever since I installed the R/T Cats I've had nothing problems. My check engine light has popped on 3 times with less than 100 miles since install. First code indicated a bad 02 sensor. Next, a hot sensor, and I haven't even taken it in to see about the third one yet!? I can't even drive the car around the block with it coming on. With no fix recommended, it looks like I wasted my time and money with this product. Corvette drivers--BEWARE!!!

increaed throttle response power increase in VTEC nice tone installation was pretty simple

little pricey

Ive been replacing my stock exhaust system piece by piece and i went with a RT HI-Flow converter because ive heard some nice things about them and when i had it installed it didnt disapoint.It had a nice power increase in VTEC and a better throttle response.i havnt had a engine light or trouble code yet.

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Nothing

Check engine light came on, No performance notice over stock cat, sounds the same, became rust after few months, and did i mention crappy product. Also don't even try to work it out with Martel or Random because they are no help!!!

Do not buy this product. Avoid at all cost. The gains was nothing better then the stock cat. Why spend 200+ when you have the same performance on you oe part. I put it on my car and check engine light came on. This really pissed me off. Called random and got the run around. If you don't want a check engine light, don't buy.

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Increased HP. Sounds great. Oxygen sensors installed easily. Great price.

No exhaust hanger where OEM hanger was.

Great product. Sounds great with Gibson dual exhaust. Definite increase in power, especially at higher RPM’s. Installation went okay. Be sure to cut the inlet pipes as close as possible to the old converter. I received an estimate at MIDAS and they wanted $597 for parts and $80+ for labor.

nice hi- range power, looks nice

price, install difficulty, increased noise

nice product, opens up the exhaust more than just a cat-back, great when done with the full cold air intake, header/cat back setup, bit on the boomy side,but at least it doesnt cheapen the deep sound of a Thermal exhaust. Also had to have the cat flange extended to install correctly.

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