I put 4-1 headers on my LS swap hatch several months back, already had 2.5" from cat back. I'm now tryin to get rid of the bottle neck (about 1.75"inlet on the cat). I still need to muffle it somewhat; so I want to put in a high flow cat.

I read up a little and found that Car Sound seems to be perferred. I also found some magnaflow models but I read they don't last long. Any other suggestions?

 

well we have no smog so im running 1 of these (not really much of a cat)

an inside shot

 

Who makes it? How much was it? Did it make your car much louder?

 

i got an ebay one with my headers, and I installed the headers and the hgih flow cat, looks exactly like SIRX cat. It didnt make that much of a sound difference but thats because I havent welded on my muffler yet its still stock. Ill let you know Im welding it on tomorrow

 

I'm running a stock hollowed out cat, i only put my real cat in for emissions .

 

magnaflow fer sur, lol(stoner talk)

it passed emissions here in ohio and bolted right in
muffled the sound a bit too

 

My cat is from an 04 Accord. Pretty good flowing, not modded.

 

for you guys with high flow cats, does it cut out the raspy-ness unlike a gutted cat?

 

mine got deeper after i installed it, its like a little resonator/muffler/emmisions good thingamabobber. although i felt a power loss from having a test pipe before it

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by KrenzyRyan &raquo;</TD></TR><TR><TD CLASS="quote">I'm running a stock hollowed out cat, i only put my real cat in for emissions .</TD></TR></TABLE>

that's what i have always done for years. BTW, the raspiness is caused from a crappy muffler, not a gutted cat. sure, the cat magnifies it, but if you have a decent muffler, you wont hear much of a difference at all.

 

Magnaflow. Guaranteed for life.