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EPA vs CARB


pacstud

Forum Member

Joined
Oct 16, 2025
Messages
136
Points
101
City
Grand Island
State - Country
NE - USA
Vehicle Year
1998
Vehicle
Ford Ranger
Drive
2WD
Engine
2.5 (4 Cylinder)
Transmission
Manual
So probably gonna happen soon, I have a pending P0420.

I can get a Walker cat for about $350. EPA certified, stainless. Or I can spend around $1k and get a Magnaflow that is CARB certified.

My question, is the better cat worth it IF my goal is just longevity? I know the CARB exhaust components are closer to OE, more precious metals, etc... but is the considerable jump in price worth it? Changing it out in five years instead of four, that's not worth $600 imo. If it lasts over twice as long, well....

I do drive "hot" 95% of the time, no short trips in the midwest. Crazy an OE cat can go to almost 400k, but the replacement only has a 20k mile warranty. The "good" one has 50k :(
 
which cat is better.?.?.?


i would wager the walker.

they build more components as oem than magnaflow.
 
I dunno, I’ve been sticking universal aftermarket ones on my stuff for years. I can have the local exhaust shop bend me up a full stainless exhaust with a universal cat for under a grand…
 
I dunno, I’ve been sticking universal aftermarket ones on my stuff for years. I can have the local exhaust shop bend me up a full stainless exhaust with a universal cat for under a grand…
Yeah, I saw those universals, I'll price check locally for install.

Found THIS on Amazon (it's Walker vendor, via Amazon, as legit as you can on Amazon). $300 for the CARB, then whatever the locals charge for install. Not bad. Says 2" pipe, interweb says OE is 2.5", can't imagine that's a big issue. Still has the warranty.
 
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