Single to Dual Cat Conversion
#1
Senior Member
Thread Starter
iTrader: (1)
Join Date: Oct 1999
Location: Carrollton, TX, USA
Posts: 779
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1992 Chevy Camaro RS
Engine: 305 TBI
Transmission: T-56
Single to Dual Cat Conversion
I have a single cat right now...will be getting SLP 1 3/4" Headers.....I need some breathing room as well as not having to worry about passing the sniffer test..so I thought that dual cats would be the way to go...Im guessing I need to get the SLP Dual cat headers....but what else will I be needing? I heard that SLP doesnt come with the actual y-pipe...just the connections to the y-pipe...could i just have an exhaust shop make one up for me? And how do I mount the extra cat? and what about the extra AIR tube? Where Do i get all this stuff? THanks
------------------
1992 Teal Camaro RS
T-Tops
305 TBI V8
Open air element
3" Flowmaster Exhaust System w/Quad Tips
Aiwa CD/Mp3 player
10 Disc CD Changer
Rockford Fosgate Speakers
SLP Headers Coming
Dynomax High Flow Cats Coming
More to come.
------------------
1992 Teal Camaro RS
T-Tops
305 TBI V8
Open air element
3" Flowmaster Exhaust System w/Quad Tips
Aiwa CD/Mp3 player
10 Disc CD Changer
Rockford Fosgate Speakers
SLP Headers Coming
Dynomax High Flow Cats Coming
More to come.
#2
Senior Member
Join Date: Nov 1999
Location: bay area, CA
Posts: 617
Likes: 0
Received 0 Likes
on
0 Posts
the SLP headers don't come with the actual y-pipe, they come with pipes that go upto the cats, you could have a shop can make the y for you. What happens with the air tube is it starts out as one tube and then goes into this little piece and comes out as two tubes, a shop could pry handle that too if you couldn't find any parts anywhere.
------------------
90 IROC 5.7l (L98)
ram air, K&N's, air foil, full exhaust
LIKE A ROC
http://members.nbci.com/IrocZgarage/home.htm
------------------
90 IROC 5.7l (L98)
ram air, K&N's, air foil, full exhaust
LIKE A ROC
http://members.nbci.com/IrocZgarage/home.htm
#3
Member
Join Date: Jun 2004
Location: San Antonio, TX
Posts: 122
Likes: 0
Received 1 Like
on
1 Post
Car: '89 Flame red metallic GTA!!
Engine: L98
Transmission: 700R4
Axle/Gears: 3.27
Re: Single to Dual Cat Conversion
So not too satisfied with the answer to this so far. There is another thread somewhere in this section where someone actually compared their track times with both single and dual cats and consistently pulled markedly better times. So I am sold and converting. My question is, where do I find the air tubes and y pipe to convert my L98 from a single cat to a dual cat car.
#4
Senior Member
Join Date: Dec 2001
Location: Pahrump, Nv
Posts: 652
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1991 z28
Engine: l98
Transmission: 700r4
Re: Single to Dual Cat Conversion
About 5 yers ago I got the Catco direct replacement setup for my 91Z. It was a sweet setup for decent price. It goes from the manifolds back. I ended up cutting the Y-off and used the flowmaster Y collector. I did this cause I welded a flange to the Y collector and flanged the SLP loudmouth catback. This makes it easy to pull the exhaust.
#5
Senior Member
Join Date: Sep 2004
Posts: 878
Likes: 0
Received 1 Like
on
1 Post
Car: 89' Iroc-Z G92
Engine: TPI 305 G92
Transmission: T-5
Axle/Gears: Limited 9 bolt, 3.45
Re: Single to Dual Cat Conversion
I have a dual cat car ill post up some pics for you, as im cutting mine out shortly in favor of some cheap edelbrock 68722 ceramic headers... aka going single cat/ test tube for now...
#6
Supreme Member
iTrader: (14)
Join Date: Aug 2006
Location: Central NJ
Posts: 12,652
Likes: 0
Received 46 Likes
on
44 Posts
Car: 86 Trans Am, 92 Firebird
Engine: 408 sbc, 3.1L of raw power
Transmission: TKO600, T5
Axle/Gears: Moser 9", 3:70 trutac, 3:23 torsion
Re: Single to Dual Cat Conversion
had to dig up a 9 year old thread for this?
#7
Banned
iTrader: (12)
Join Date: Jul 1999
Location: Bertram (outside Austin), TX
Posts: 12,212
Likes: 0
Received 10 Likes
on
10 Posts
Car: 87 GTA
Engine: L98
Transmission: 700R4
Axle/Gears: Dana M78 3.27 posi
Re: Single to Dual Cat Conversion
With a quality aftermarket converter, there is really no need for dual cats. Un less you have a SERIOUS engine that truly needs the extra airflow. Otherwise, all your doing really, is adding extra weight to the car.
Trending Topics
#8
Supreme Member
iTrader: (7)
Join Date: Mar 2000
Location: Orange, CA
Posts: 5,674
Likes: 0
Received 106 Likes
on
65 Posts
Car: '90 Trans Am-12.45@110.71
Engine: 355 w/AFR 195's Elem. 400/430 HP/TQ
Transmission: Tremec T-56
Axle/Gears: 12 Bolt 3.73
Re: Single to Dual Cat Conversion
Wow! I didn't know that.....those damn GM engineers got me again.
Thread
Thread Starter
Forum
Replies
Last Post