Hi-flow cat #'s - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

Reply
 
 
 
Thread Tools Search this Thread
Old 05-07-2006, 11:03 PM   #1
Senior Member
Posts like a Northstar
Thread Starter
 
bonnevillemac's Avatar
 
Join Date: Sep 2004
Location: The Bluegrass State
Posts: 522
Thanks: 0
Thanked 0 Times in 0 Posts
bonnevillemac is on a distinguished road
Default Hi-flow cat #'*

Ok guys, confusion reigns supreme, I have looked up jeg'* website for hi flow cats
and have found three part numbers.

1). 54305 Round

2). 94305 Oval

3). 94315 Oval w/air tube.


Which one do I need to order


Tim
bonnevillemac is offline   Reply With Quote
Old 05-08-2006, 08:08 AM   #2
Senior Member
True Car Nut
 
toastedoats's Avatar
 
Join Date: Sep 2004
Location: Fitchburg Ma _ToastedRice_
Posts: 6,837
Thanks: 0
Thanked 0 Times in 0 Posts
toastedoats is on a distinguished road
Default

toastedoats is offline   Reply With Quote
Old 05-08-2006, 08:15 AM   #3
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

Yes...aim for the cat that has the front flange on it already. Much easier to install.
BillBoost37 is offline   Reply With Quote
Old 05-10-2006, 01:14 AM   #4
Junior Member
Posts like a Ricer Type-R
 
Join Date: May 2006
Location: Boise Idaho
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
SSEIBANDIT is on a distinguished road
Default Performance Gains?

Anybody know what the gain is for a HF Cat?. I have a 2000 SSEI all stock.
SSEIBANDIT is offline   Reply With Quote
Old 05-10-2006, 07:28 AM   #5
Senior Member
True Car Nut
 
toastedoats's Avatar
 
Join Date: Sep 2004
Location: Fitchburg Ma _ToastedRice_
Posts: 6,837
Thanks: 0
Thanked 0 Times in 0 Posts
toastedoats is on a distinguished road
Default Re: Performance Gains?

Quote:
Originally Posted by SSEIBANDIT
Anybody know what the gain is for a HF Cat?. I have a 2000 SSEI all stock.
i feel a difference in my SE since putting it in, i also removed the resonator an dhave ported exhaust manifolds, but i think the cat made the biggest difference
toastedoats is offline   Reply With Quote
Old 05-10-2006, 09:22 AM   #6
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

I swapped one out on my 97 SSEi and felt no difference. Only thing I noticed was a slightly louder exhaust tone and the extra space in my wallet.
BillBoost37 is offline   Reply With Quote
Old 05-10-2006, 10:55 AM   #7
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

You won't normally feel it unless your cat was old/clogged to begin with. It adds about 5hp assuming your old cat was flowing to spec, and that'* a little low on the butt-dyno detection threshold.
willwren is offline   Reply With Quote
Old 05-10-2006, 11:24 PM   #8
Junior Member
Posts like a Ricer Type-R
 
Join Date: May 2006
Location: Boise Idaho
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
SSEIBANDIT is on a distinguished road
Default

Was wondering on fuel mileage, If 5 hp is it, is it worth it for the money spent. My 454 in my truck got 10mpg (3/4 ton 4x4) Installed 2 1/2 inch new exhaust and went to 15 mpg stil using Stock cast iron manifolds. Thats 50% gain in gas mileage. If you can install headers and hi flow exhaust on a Blown Bonni what could the gain be???
SSEIBANDIT is offline   Reply With Quote
Old 05-11-2006, 10:31 AM   #9
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

that type of an increase that you got on the truck does not seem typical.

I doubt you'd see anything more than a 1-2mpg difference on a bonne unless you were battling a clogged cat.
BillBoost37 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Hi Flow Cat and HO2S questions. Telepath Performance, Brainstorming & Tuning 15 10-02-2004 09:38 PM
Gains from CAI, hi-flow cat, and muffler Glasuan Performance, Brainstorming & Tuning 10 11-19-2003 12:23 AM
High flow cat CraZyDriVer868 General GM Chat 16 09-04-2003 02:30 AM
High flow cat Sol Performance, Brainstorming & Tuning 18 06-02-2003 06:47 PM
HI FLOW CAT HELP? Paulnold Performance, Brainstorming & Tuning 20 12-10-2002 06:17 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 01:54 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.