JT High Flow Catalytic Converter for Chevy and GMC Models

Curated from 101 real Reddit conversations

Refreshed on: March 14, 2025

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JT High Flow Catalytic Converter for Chevy and GMC Models

Brand: JT
Price: $196
Snoop Score:
5.7
Sentiment
4.4
Popularity
9.8
Technical
4.1
Buy on Amazon for $196See All Catalytic Converters Reviews
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Snoop's Take

The JT High Flow Catalytic Converter is designed specifically for various Chevy and GMC models from 1999 to 2007, effectively transforming harmful emissions into more environmentally friendly gases while meeting EPA OBDII emission requirements. Users appreciate the product's direct-fit design, which makes installation straightforward, with one noting that it "passes smog with the same ol' replacement cat, no issues at all." While many customers commend its high-quality materials and long service life, some express concerns about the overall quality compared to aftermarket options like Walker, indicating a mixed sentiment about its reliability. Overall, the JT High Flow Catalytic Converter is a viable option for those looking for a cost-effective solution that meets EPA standards and provides easy installation for their vehicles. However, potential buyers should weigh the feedback regarding quality against their specific needs and preferences before making a purchase decision.

Not for you? Check out our other rated Catalytic Converters

Cheap catalytic converters? Are they fake?

Positive Feedback

I’d spend the extra money and buy a Walker or AP/Eastern.

Negative Feedback
Product
5.7
JT High Flow Catalytic Converter for Chevy and GMC Models
Buy on Amazon for $196
Check Engine Light Repair
4 / 10
Emissions Compliance Upgrade
7 / 10
Performance Enhancement
7 / 10
Direct OEM Replacement
7 / 10
See how this compares to all Catalytic Converters

What it does well!

Key strengths users can’t stop talking about.
Direct-fit design ensures easy installation
“Cheap catalytic converters? Are they fake?”➕
“Just caught a couple of guys trying to steal my catalytic converter. Is this going to be an expensive fix?”➕
“I’d like to hear your thoughts and opinions on OEM vs aftermarket catalytic converters.”➕
“Yep. Passes smog with the same ol' replacement cat, no issues at all.”➕
High quality materials for longer service life
“* Improves exhaust flow * allows flames to exit to exhaust (if straight through system) * increased exhaust "rasp" * You'll fail emissions”➕
Meets EPA emission standards
“In isolation, effectively nothing.”➕

Where it needs some work!

Areas to watch—feedback on possible improvements.
Quality concerns with JT converters
“I’d spend the extra money and buy a Walker or AP/Eastern.”➕
“All aftermarket cats are against EPA in all 50 states for road use.”➕

Compare On All Talked About Dimensions

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Core Power Plays

The specs and strengths that make it shine.
Discussion on quality differences in catalytic converters
“Most of the time the off-brand or economy ones are lower quality.”➕
“Cheap cats are just that cheap. Not fake but fit might be poor.”➕
General discussion about catalytic converter materials and value
“Its been super popular lately for ppl to steal...easy money I guess”➕
“I don't think anyone else in this thread so far agrees with you :D”➕
“I have heard of that, think it depends on the state”➕
“Yea, I think the fact that it is used, cut off like shit, there are limited buyers, and those selling it are desperate for immediate money drops the price a lot.”➕

Buyer’s Cheat Sheet

What to check before you click ‘Add to Cart.’
Discussion on replacement costs and experiences
“All the metal processors in my home town will pay for catalytic converters as long as they're uncut”➕
“I had a Walker brand cat installed after my OEM one was stolen and the E runs the same like it never happened”➕
“My situation is very similar, I got a 2005 Honda Accord 2.4 and looking for a replacement after mine was stolen”➕

Cautionary Callouts

Know the pitfalls before they catch you off guard.
Discussion on catalytic converter failure reasons
“Catalytic converters go bad for basically two reasons…”➕
“You can gamble the $20, but it's unlikely to do anything.”➕
“P0420 doesn’t. Mean you have a bad cat.”➕
Skepticism around catalytic converter cleaners
“So you put on a high flow cat and it tests as clean as a whissle. You pass the functional test.”➕
Catalytic converter theft is rampant and costly
“Someone cut and stole my catalytic converter last night…”➕
“Only mildly infuriating? Wait until you see what it costs to replace it.”➕
“Some junkyards are only open from like 8pm-6am… because they’re the ones either stealing them or buying them knowing they’re stolen.”➕
“It's happening enough in Tucson that police departments are having days where people can come in and have their vin etched on them for free.”➕
Mention of preventive measures against theft
“Why didn't they get a catloc?”➕
Discussion on catalytic converter theft
“Er, why exactly do they steal these? I can’t imagine the trace metals are worth THAT much?”➕
“Be careful once it’s been replaced. Heard reports of thieves circling back a week or so later to steal the new cats (especially if you’re driving an older car).”➕
“Hopefully insurance will help cover it”➕
Discussion on reasons for catalytic converter theft
“Couple hundred bucks for a minutes worth of work”➕
Discussion about selling catalytic converters
“Every list I found online is very vague, as in "$8 to $400".”➕
“Don’t call a scrap yard call actual shops that specifically deal with cats”➕
“And even then, might be better off calling around vs simply just the junkyard”➕
Discussion on motivations behind catalytic converter theft
“Will you please just give me it back? You have seriously fucked me.”➕
“People are victimizing their own friends, children and families.”➕
“Probably better overall than stealing catalytic converters in sub zero temps.”➕
Discussion on the impact of driving without a catalytic converter
“It's terrible for the environment and smells real bad, but you can fix the theft with a ~$150 straight pipe job.”➕
“You'll lose a lot of your back pressure and your ear drums will hurt but it's not a end your car kind of deal.”➕
General frustration about catalytic converter theft
“I do feel wronged tho.”➕

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