emission legal exhaust

[NJMR2]

I was planing on getting the Ko racing exhaust but it is not emission legal. What would be my best choice as a catback system for under $550 that is emission legal. I was looking at the apexi n'1 but im not sure if that is even legal, and the hks turbo. Any recomendations would be greatly appreciated. Thanks

[bluetwo]

technically, any exhaust system that removes one or both catalytic converters is not "emissions legal". if you really want to stay legal all year round, your best bet is to get a secondary cat back muffler, like the greddy sp, fujitsubo legalis r, or marcor genie. there may be others out there.

you won't see much power gains with these units, however, as the cats are the primary restrictions in the exhaust flow. most people have been able to pass emissions inspections with just the primary cat, so a primary catback exhaust system may be what you are looking for. in this case, the KO racing exhaust fits the bill, as it bolts up to the stock cat/turbo elbow.

[mister3]

Originally Posted by bluetwo

technically, any exhaust system that removes one or both catalytic converters is not "emissions legal". if you really want to stay legal all year round, your best bet is to get a secondary cat back muffler, like the greddy sp, fujitsubo legalis r, or marcor genie. there may be others out there.

you won't see much power gains with these units, however, as the cats are the primary restrictions in the exhaust flow. most people have been able to pass emissions inspections with just the primary cat, so a primary catback exhaust system may be what you are looking for. in this case, the KO racing exhaust fits the bill, as it bolts up to the stock cat/turbo elbow.

we build custom exhausts here from time to time -- could add a 3" b-pipe w/high flow cat to retain emissions -- then either a OEM muffler or other "cat back" system which bolts to the B-pipe (GReddy SP) -- we can also make a custom muffler/tip which attaches to the stock b-pipe location or wraps around under the car similar to the BLITZ nur spec

[Carcatz]

I was told in mass removing secondary cat you will pass emissions. I am no pro Its just what I was told on another forum!

[mister3]

Originally Posted by Carcatz

I was told in mass removing secondary cat you will pass emissions. I am no pro Its just what I was told on another forum!

you can pass the tailpipe if the secondary cat is gone -- but places like CA like to check at times to see if you have both cats in place and functional

[HondaChili]

this may be your answer, im looking into the same idea, and as you asked before the Apex'i N1 is no good for emissions. I currently have one. What i plan to do is to get an emmisions legal cat back but do an exhaust cut-out ( or exhaust bypass). You'll have to find someone that can customize the cut out for you and set up an indash switch that opens and closes the valve. Ive seen this done on many cars and belive me they sound SICK. This way you can go to an emmisions test with near stock exhaust and still be able to haul ass on the way home . Im not sure if this system matters too much for the mr2 since there isnt too much piping to begin with, or have i seen one being done on a mr2, but when i find out ill let you know.

[mister3]

Originally Posted by HondaChili

this may be your answer, im looking into the same idea, and as you asked before the Apex'i N1 is no good for emissions. I currently have one. What i plan to do is to get an emmisions legal cat back but do an exhaust cut-out ( or exhaust bypass). You'll have to find someone that can customize the cut out for you and set up an indash switch that opens and closes the valve. Ive seen this done on many cars and belive me they sound SICK. This way you can go to an emmisions test with near stock exhaust and still be able to haul ass on the way home . Im not sure if this system matters too much for the mr2 since there isnt too much piping to begin with, or have i seen one being done on a mr2, but when i find out ill let you know.

we did this on our shop car years ago

http://www.chicoraceworks.com/gallery/album11/IMG_0071 -- this was 3" piping with cut out and had a 3" high flow cat and a GReddy SP cat back

could put an electronic valve there no prob and go straight pipe

[HondaChili]

Originally Posted by mister3

we did this on our shop car years ago

http://www.chicoraceworks.com/gallery/album11/IMG_0071 -- this was 3" piping with cut out and had a 3" high flow cat and a GReddy SP cat back

could put an electronic valve there no prob and go straight pipe

thats what im talking about, how did u like it?

and how was the sound? im thinking about doing in, or maybe just go with fujitsubo.

[mister3]

Originally Posted by HondaChili

thats what im talking about, how did u like it?

and how was the sound? im thinking about doing in, or maybe just go with fujitsubo.

we liked it alot -- was nice and quiet + stock looking -- when it came time to race just uncork it and go