High flo cats
Thread Starter
Burning Brakes
Joined: Oct 2005
Posts: 1,074
Likes: 0
From: Texas
High flo cats
What kind of high flow cats are you guys using? I want to get some for my nearly stock a4 c5 with B&B Bullet cat back(no headers yet). but all I find out there on the internet are random techs for $500!!!! Way more than what I want to pay for high flows. My only intention is strictly for louder sound level. Is this even the way to go for loud sound? Any opinions are of course welcome and encouraged.
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
What kind of high flow cats are you guys using? I want to get some for my nearly stock a4 c5 with B&B Bullet cat back(no headers yet). but all I find out there on the internet are random techs for $500!!!! Way more than what I want to pay for high flows. My only intention is strictly for louder sound level. Is this even the way to go for loud sound? Any opinions are of course welcome and encouraged.
Le Mans Master
Joined: Aug 2005
Posts: 5,375
Likes: 328
From: CA.
St. Jude Donor '13-'14-'15
the magnaflow metal substrate spun cats are good instead of the $$$$ randoms--they sell for about $110 ea. Also on e-bay there are some metal cats same style as the spun Magnaflows--i'm sure not quite as good but not bad for about $60 each--the cheaper hi-flows are all ceramic based and don't hold up as well in a hi-flow design--those are also around $35 ea. in a spun design---I used the $60 ones called Thunderbolt from Performance Curve.
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
the magnaflow metal substrate spun cats are good instead of the $$$$ randoms--they sell for about $110 ea. Also on e-bay there are some metal cats same style as the spun Magnaflows--i'm sure not quite as good but not bad for about $60 each--the cheaper hi-flows are all ceramic based and don't hold up as well in a hi-flow design--those are also around $35 ea. in a spun design---I used the $60 ones called Thunderbolt from Performance Curve.
Le Mans Master
Joined: Jan 2006
Posts: 9,050
Likes: 665
From: Norcal
the magnaflow metal substrate spun cats are good instead of the $$$$ randoms--they sell for about $110 ea. Also on e-bay there are some metal cats same style as the spun Magnaflows--i'm sure not quite as good but not bad for about $60 each--the cheaper hi-flows are all ceramic based and don't hold up as well in a hi-flow design--those are also around $35 ea. in a spun design---I used the $60 ones called Thunderbolt from Performance Curve.
I bought 2 for $80 shipped. Now myonly problem is paying shipping again. 
I had to send them to a buddy out of state and he is sending them to me in CA
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Joined: Jul 2004
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From: .... NJ
Cruise-In VII Veteran
St. Jude Donor '05 thru '19
Get headers if you want to go louder. You want to make sue if you do want headers in the future that the cats will work with them. A lot of the complete header packages come with high flow cats and X pipe.