High Flow Cat/exhaust question
01-02-2007, 06:04 PM
#1
Instructor
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High Flow Cat/exhaust question
Got my new Magnaflow catback system in today. While I am at it, Should I put in a high flow cat? Does it have a decent effect on performance or are there any negative effects on the O2/emission system?
01-02-2007, 06:09 PM
#2
Le Mans Master
Hi flow cat doesn't serve much in the performance range (3-5) or atleast not noticable. If you still have the original cat, I would go ahead and do it. It's better than going no cat at all.
01-02-2007, 06:28 PM
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I put on a Magnaflow Hi-Flow main cat. I got a little more sound and about 1 MPG increase in gas milage. I wish I had done the cat-back at the same time.
01-02-2007, 06:44 PM
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St. Jude '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-‘19-'20-'21-'22-'23-'24
I replaced my test pipe with a Magnaflow cat. SOTP comparison; no difference from the test pipe. Track times are equivalent as well.
Best $127 I spent yet.
Best $127 I spent yet.
01-02-2007, 10:22 PM
#5
Team Owner
The key here is knowing the year of the car in question... his is a 1991.
This is what I would do: Remove the precats, replace the center cat with a high flow unit. That will pick up 20hp...
This is what I would do: Remove the precats, replace the center cat with a high flow unit. That will pick up 20hp...
What changed!
01-03-2007, 10:29 AM
#11
Team Owner
01-03-2007, 02:31 PM
#12
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Definately a little more sound at WOT, no highway resonance to speak of.
Who knows if I have more HP.
