CL-S progression 01

iTrader: (2)

so i search for the xlrq high flow cat and I find everything about it, but what I wanna know.

I cannot seem to find another who has a before and after opinion on the whole matter.

i`m scared of losing some low rend for top end, but how noticable is it

also will i be able to pass emissions with this or no

some feedback would be greatly appreciated folks thanks

fuzzy02CLS

iTrader: (2)

I did.

Added noise & lost low end I thought. No dyno numbers though. I sold it after about a year of use. I did not like the added drone & it changed the pitch of my exhaust. Others liked it, but it wasn't for me.

CL-S progression 01

iTrader: (2)

yea i was afraid of that answer:-(

I love how the car is quiet then screams when u floor it. I guess this will not be the case anymore if i add it on

Excelerate

iTrader: (1)

We've actually released a new design. That was a custom setup by Random Tech. We now have a full 2.5" IN/OUT high flow cat that uses a different cat and different flanges.

http://store.excelerateperformance.c.../i-494447.aspx

I'm not sure what the difference is in the exhaust note but this cat should make 10 hp/tq on the CL/CL-S due to the fact that the OE cat is highly restrictive.

CL-S progression 01

iTrader: (2)

i have every bolt on but hfc and cat back.... but full exhaust is too much to ship, mufflers cost 720 here. and if this is like 500 shipped to my door, and get me 7 to 10 tq and hp it does sound intiseing.

if i got just the cat would the rest of the oem exhaust set up hinder its ability. i have been jonesing for a next power mod for some time now and i do love the fact the cat comes with the o2 bung which is angled (i assume to give proper clearance, as straight ones often end up rubbing on the frame or heatshield.)

and sorry but what is the inlet and outlet of the cl-s cat and cell count. cause i have comptech headers which is 2.5 i believe on the outlet. which goes to the cl-s cat which does what exactly. i`m trying to figure out how inconsistent it is. thanks

civicdrivr

iTrader: (9)

The CT headers are 2.25" at the outlet, same as stock.

fuzzy02CLS

iTrader: (2)

Mine looked the same... IDK?

CL-S progression 01

iTrader: (2)

ok so it's 2.25 and the cat converter has what inlet and outlet?

CL-S progression 01

iTrader: (2)

and i guess my last question would be i know it's not carb legal but will the car potentially pass an emissions test? cause right now my car is virtually perfect. but i don't know nearly enough to to decide whether it may or definitely will not.

gnuts

iTrader: (1)

ct headers are 2.5" until the outlet at the cat where it goes down to 2.25". The XLR8 cat is 2.5" in and out.

i'm also curious about emissions. This might be my next purchase.

CL-S progression 01

iTrader: (2)

if it clearly cannot pass emissions then i don't think it's worth it.

and the exhuast will be stink with it too i assume

gnuts

iTrader: (1)

i think it would still pass emissions. Plus you could always keep your oem cat and swap it in before the test. I doubt the exhaust would smell. It's still a cat...it just flows much better. Smelly exhaust is from no cat.

gnuts

iTrader: (1)

XLR8: let's work something out and i'll get you some HD video of the before and after sound. Maybe dyno #s.

CL-S progression 01

iTrader: (2)

it is going from a 1200 cell count to a 200 cell count.. I'm no scientist but that should mean the exhaust will be at least 6 times more toxic. so that would likely mean it's gonna stink.

does anyone know if it wold or not definitively?

Excelerate

iTrader: (1)

If you eliminate the cat you will smell the exhaust more. Our high flow cat is a 200 cell cat; it still filters emissions, just not as much as before. It should pass inspections in every state except CA.

CL-S progression 01

iTrader: (2)

doesn't ontario have the same standards as cali?? gnutz

gnuts

iTrader: (1)

not sure but probably not far off. it looks as though it wouldn't pass here...oh well. i might just grab a magnaflow and keep my oem for emissions time.

civicdrivr

iTrader: (9)

Do they just do a visual there or do they hook up the sniffer as well?

gnuts

iTrader: (1)

sniffer goes up the tail pipe, then they run the car on rollers and have to hold steady at around 60km/h for a few minutes. Check gas cap seal.

civicdrivr

iTrader: (9)

Ugh. One of those. I don't miss that test in NY.

Maybe you should be good friends with the inspection guy so he can "cheat"?

brian6speed

iTrader: (5)

I passed emissions today with the xlr8 cat in Illinois. I have the older version I think it is 300 cell count.

gnuts

iTrader: (1)

do they use a sniffer up your exhaust to measure hydrocarbons etc?

brian6speed

iTrader: (5)

No they did not.

OperationDarkie

iTrader: (1)

Yeah but here in IL all they do is the OBD2 plug check for codes, they used to use sniffers back in the day but they quit that real quick.

CL-S progression 01

iTrader: (2)

lol so a defouler would make u pass basically

CL-S progression 01

iTrader: (2)

well i just put my order in for the XLR8 HFC and vibrant J bung to get rid of CEL...

this is basically the last bolt on there is left to do to my car.

very interested in the results I will keep everyone posted

provided the car isn't too loud I may be persuaded to get a custom 2.5 inch y pipe built with a glasspack mid muffler.. we will see how she goes.

but i am dying for more power and a louder exhaust

gnuts

iTrader: (1)

Go back to same shop and dyno once you get it on. I'll get mine done too. Then you'll know how much you gained exactly.

CL-S progression 01

iTrader: (2)

oh i intend buddy for sure!!..

ct mufflers, and now this HFC will be the only differences..\
\hopefully i will see 240 whp or more.. 229 was last time with holes in my mufflers

CL-S progression 01

iTrader: (2)

just got it today that was super fast.

so far it was 377 for the o2 bung and HFC then i get a 101$ duty fee at the door...

so this turned out to be a half thousand dollar mod.

lets hope it does what i expect it to

quality looks amazing tho welds are perfect.. cannot complain yet

gnuts

iTrader: (1)

Let Me Know When You Want To Hit Up The Dyno.

CL-S progression 01

iTrader: (2)

lol yea man 100%... 12 hrs and i should ave the HFC installed Muahahahaha

CL-S progression 01

iTrader: (2)

ok install is done took about an hour of leisure working.

cat bolts came right off no torching needed. no gaskets used i used that copper silicone gasket stuff and it sealed everything right up.


as for the resultss.... welll


:-) surprisingly the cat is not much louder, upon start up its not noticeable when its warm, car has a little less deep hmmmm to it when u are on the throttle down low but when u get up high is seems there is more power. car is chirping every time i go 1st to 2nd now which use to only happen under certain conditions.

i think its apparent the car is faster now... i'm happy the car is not much louder at all, when daily driving u wont even notice a difference. i got ct headers, xlr8 hfc and ct mufflers and its quiet IMHO

azeezp13

iTrader: (4)

You think you'll be able to pass emissions with the XLR8 HFC?

gnuts

iTrader: (1)

Doubt It. I Have To Go This Week For My Test. I Had A magnaflow Hfc Before And My Numbers Were Bang On The Limit

CL-S progression 01

iTrader: (2)

well the exhaust doesnt smell bad but after comparing the piping size and internals of each it's evident the HFC flows probably 2-3 times better..

there is a slight odor from the tailpipe now but it aint no fart smell. but if I can smell something different imagine the sniffer up my tailpipe..

im debating whether i should go for it and try with the HFC or just save my oem cat and put it on when i get emissions. cause i can get 100$ for my oem cat just for the metals inside it.

ps. as for the sound i think the exhaust did get louder and the motor got a lil quieter when u hit v tech. now the exhaust is hear instead of the motor overriding the not of the exhaust. all in all i think this is the icing on the cake for the exhaust and i should be done trying to find power... SHOULD B

gnuts

iTrader: (1)

i would keep the oem cat for emissions.

CL-S progression 01

iTrader: (2)

ps i measured the flange from the comptech usa headers and it was 2.1 inches :-o then the xlr8 cat is 2.4inches then the cl-s y pipe is 2.1ish i think.. cannot remember that one exactly

brian6speed

iTrader: (5)

For gaskets you can buy the one that connects to the header from advance auto. Just have them look up the gasket for the generic replacement exhaust in their system. For the rear gasket any 3 bolt 2.5" should suffice.

On the ct headers at the end where cat bolts too, they use a compression ring gasket. The gasket sits inside a lip that sticks out inside the piping making it smaller diameter. Since I am using crush gaskets instead of the rings I was able to grind down that lip which gives more flow.

I had the xlr8 HFC but switched to the xlr8 test/straight pipe. I am happy with it. A little more sound and smell which I like.

I would be very interested in seeing gains on a dyno before and after.