Reviews of MAGNAFLOW catalytic converter

Direct fit, Magnaflow p/n 23710.

After my OE cat went 'can of marbles,' and after a similar dealer quote, I went with a Magnaflow high-flow cat. I've had a persistent P0420 since installing it (with 2.25" Remus exhaust), so have bought a 42dd spacer for the rear O2 sensor.

Might as well go with a magnaflow high flow from performance peddler; costs less than an OEM one anyway. I think i paid $110 shipped.

just installed my 2.25 inch catback and my new dp+cat becuase i needed to replace it, i used a magnaflow high flow cat with a tt with borla muffler catback, i went to put in my 02 sensor but found out the threads were damaged so it wouldnt go in, so i just put in the plug that came in the 02 hole on the cat and started it up becuase i wanted to hear how it sounds, and quite frankly it sounds awful, much louder than expected, rev sounds awful and comes back down to idle with numerous backfires.