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View Full Version : which cars cat can we use??


gfrg88
04-21-2006, 07:36 AM
i was looking around ebay trying to find a high flow cat for our cars, i didnt find any that i really liked, but there seemed to be a lot more that i liked for other cars. my question is can we use a cat for something like a 4g accord, or integra or some other car???
2drSE-i
04-21-2006, 08:56 AM
well yea. all that really matters is pipe diameter
MessyHonda
04-21-2006, 02:45 PM
im going to get my exhaust done and i already have a Magnaflow muffler so i want to stick with a high flow cat. i went on ebay and i saw that the Magnaflow has a direct replacementwith out cuting or welding.
http://cgi.ebay.com/ebaymotors/MAGNAFLOW-CATALYTIC-CONVERTER-87-89-HONDA-ACCORD-22623_W0QQitemZ8052189937QQcategoryZ33629QQssPageN ameZWD1VQQrdZ1QQcmdZViewItem
oldschool3g
04-21-2006, 04:07 PM
hey guys whats the best cat for our cars and at what diameter?
A20A1
04-21-2006, 08:31 PM
well the pipe diamter and actual cat inside diameter can vary. I woud stick with a 2.25" pipe diamter, and find a cat diameter that flows well. Unless you are running a bigger exhaust pipe.

Remember that our cat has an offset inlet and outlet so no cat will really bolt up that has a center in and out uless you mess with the exhaust pipes, or the cat is long enough so that you can just make use of the flex pipe to adjust the alignment.
gfrg88
04-21-2006, 09:10 PM
so we can use any other honda cat right??? i just wasnt sure if the bolt pattern for the cats were different or not :dunno:
LiTtLe xOx BitT
04-22-2006, 07:28 AM
I have the one off ebay, the test pipe one. It bolted right up with no problem and came with nice gaskets and new bolts, washers and nuts.
gfrg88
04-22-2006, 12:58 PM
is that a stock camara/firebird car or a high flow one, and any year for that will work right?
A20A1
04-23-2006, 12:16 PM
What he has is universal.

If you want to go the universal route then you'll need to weld your pipes to the cat.

Some come with a flange on one end and a pipe on the other.
sinisterfuzzy
04-25-2006, 04:42 PM
^^^
And it's a high-flow from Summit.

how much performance will you see by replacing the exhaust and headers?
gfrg88
04-25-2006, 05:29 PM
header, exhaust, and high flow cat/test pipe should help you out a lot there, match that with a cam and you will see even bigger improvements.
sinisterfuzzy
04-26-2006, 01:31 PM
header, exhaust, and high flow cat/test pipe should help you out a lot there, match that with a cam and you will see even bigger improvements.

can you give me numbers? horsepower/torque?
LiTtLe xOx BitT
04-26-2006, 03:08 PM
It all depends on what grind cam you get, what header you have (DC or Pacesetter), what cat you have, what size exhaust pipe and type of muffler, and if you have a CAI. Everything is a factor and depending on what you have it will vairy.
gfrg88
04-26-2006, 03:14 PM
well there really isnt anyone on here that dynos before and after mods. so your on your own there. i think with all that i mentioned you can easily get ove 15whp :dunno:
MessyHonda
04-26-2006, 07:54 PM
yeah that sounds about right. you can free up some hidden hp by geting a high flow air filter, upgraded exhaust with high flow cat. and it depends on how good the engine is...like mine has like 50k on it and i have good compression. also take out the crap you have on your car...i saved like 80 pounds on crap