Magnaflow high flow cats

[btvollmuth]

Anyone running these? It's been a couple weeks now and the exhaust needs something put back into it. I wear earplugs on the highway. Plus it's making zero back pressure.
So I looked around and this is what I came up with:

A "close-to-factory-size" rear converter...

http://www.summitracing.com/parts/MPE-94006/


Or this larger one with a resonated core, which I'm leaning towards...

http://www.summitracing.com/parts/MPE-94406/

Any opinions are appreciated, as well as any input from anyone actually running high flow cats.

[UncleLar]

I had them on my 2002 P71 with Magnaflow mufflers and an H pipe with oem size pipes.Here's a side by side comparison with Sanco's 2004 P71 with Flowmasters,x-pipe and bigger pipes.
Mine is the first one to rev,the car on the left.

http://www.youtube.com/watch?v=HEhftBGawlk

[D Rock]

I'm running these. http://www.amazon.com/Magnaflow-54306M-Universal-Catalytic-Converter/dp/B002MEVQH8/ref=sr_1_3?s=automotive&ie=UTF8&qid=1345166595&sr=1-3&keywords=Magnaflow+54306m

[capt512]

I ran them on my old 01 CVPI and was a big fan, a little more low rumble (just a little), and seemed to open it up.

[RacerX]

I'm running those. I have FRPP shorty headers going to CObra exhaust, those cats into magnaflow X-pipe then to stock MM exhaust pipes with Magnaflow mufflers.

[ctrlraven]

I run two of these, very compact but handle a lot.
http://www.magnaflow.com/02catalytic_converters/02product/displayuniversal.asp?universal =59956

https://sphotos-b.xx.fbcdn.net/hphotos-prn1/62504_1271884655760_7823424_n. jpg
https://sphotos-a.xx.fbcdn.net/hphotos-prn1/44269_1283225459273_6463086_n. jpg

[btvollmuth]

Orded the smaller ones. The larger ones won't fit under the cross member right before the H-pipe. Thanks for all the info.

[SC Cheesehead]

[QUOTE=btvollmuth;1209128]Anyone running these? It's been a couple weeks now and the exhaust needs something put back into it. I wear earplugs on the highway. Plus it's making zero back pressure.
So I looked around and this is what I came up with:

A "close-to-factory-size" rear converter...

http://www.summitracing.com/parts/MPE-94006/


[QUOTE]

^^^^^^ That's what I'm running and they're working out well.

FRPP shorty headers, Mac Pro-Chamber mid pipe, the high flow cats feeding into OEM mufflers, rear pipes and 4" res-delete tips.

[tbone]

Who needs cats with a tune? lol

(Unless you live in a visual inspection state).

[Marauderjack]

I've been running those since the exhaust upgrade in 2006.......no problems and 115K miles so far!!:beer: