XLR8 Performance High Flow Cat!!!
Thread Starter
Former Sponsor
iTrader: (1)
Joined: Mar 2004
Posts: 9,877
Likes: 624
From: www.ExceleratePerformance.com
XLR8 Performance High Flow Cat!!!

Well in addition to our XLR8 test pipe (cat delete for the third cat which includes tabs for the heat shield), we have now added a high flow third cat for the TL 04-08, 07-08 TL-S. This is a fully stainless steel body with a 2.5" IN/OUT with a 200 cell metallic substrate catalytic converter with heat shield tabs. It comes with all the hardware needed and gaskets for both sides.

http://store.excelerateperformance.c.../i-300866.aspx
These are ready to ship!!!
A question... I am looking to get the XLR8 j-pipe and was going to add the test pipe, but should I get this instead?
What will give me better performance? Would this cat change the sound like the test pipe?
Thanks guys
What will give me better performance? Would this cat change the sound like the test pipe?
Thanks guys
Thread Starter
Former Sponsor
iTrader: (1)
Joined: Mar 2004
Posts: 9,877
Likes: 624
From: www.ExceleratePerformance.com
It depends on what you want. The gains will be very similar; the test pipe might make one hp more. The test pipe will make the exhaust more aggressive whereas the catted pipe can help reduce some of the raspiness.
I definitely want the aggressive sound, which is why I am leaning towards the test pipe....but the raspiness is obviously a negative.
Does this cat alter the sound from the OEM cat?
What are you guys going for out there?
I'm itching to purchase next week and need to decide soon...
Does this cat alter the sound from the OEM cat?
What are you guys going for out there?
I'm itching to purchase next week and need to decide soon...
Thread Starter
Former Sponsor
iTrader: (1)
Joined: Mar 2004
Posts: 9,877
Likes: 624
From: www.ExceleratePerformance.com
I definitely want the aggressive sound, which is why I am leaning towards the test pipe....but the raspiness is obviously a negative.
Does this cat alter the sound from the OEM cat?
What are you guys going for out there?
I'm itching to purchase next week and need to decide soon...
Does this cat alter the sound from the OEM cat?
What are you guys going for out there?
I'm itching to purchase next week and need to decide soon...
^ I agree. The PCD are a rasp monster. Any one planning to get PCD will need all the help that you can get to reduce rasp. Seeing that the 3rd cat losses only 1 or 2 hp, it is worth it to get the High Flow Cat instead of the race pipe to reduce that rasp.
Trending Topics
I don't plan on doing a PCD, simply due to the fact that I don't wanna deal with emissions, but I'm going to do a j-pipe so is it really worth spending the extra money on a High Flow Cat instead of getting the test pipe? Is there a lot of rasp solely with a j-pipe and test pipe?
I don't plan on doing a PCD, simply due to the fact that I don't wanna deal with emissions, but I'm going to do a j-pipe so is it really worth spending the extra money on a High Flow Cat instead of getting the test pipe? Is there a lot of rasp solely with a j-pipe and test pipe?
I do plan on getting PCD's. I can't resist those kind of gains. I'm hoping a resonator will get rid of most of the rasp.
This is going to be my first update to the exhaust system....I was thinking of going j-pipe and test pipe or this new cat. And hopefully XLR8 quad exhaust to follow soon after. So what do you guys recommend? Is the only issue with the rasp from the test pipe?
Thread Starter
Former Sponsor
iTrader: (1)
Joined: Mar 2004
Posts: 9,877
Likes: 624
From: www.ExceleratePerformance.com
IMO, this is a MUST have if you are running the PCD's. stock cats are not only high cells cats, but they bottleneck too. 200 cell with 2.5 in/out is exactly what we need.
josh, lets get a GB going for this
oh, and what kind of warranty does this come with? cause ive used a metal cat where the 3rd should be, that had substrate failures.
josh, lets get a GB going for this

oh, and what kind of warranty does this come with? cause ive used a metal cat where the 3rd should be, that had substrate failures.
Thread Starter
Former Sponsor
iTrader: (1)
Joined: Mar 2004
Posts: 9,877
Likes: 624
From: www.ExceleratePerformance.com
IMO, this is a MUST have if you are running the PCD's. stock cats are not only high cells cats, but they bottleneck too. 200 cell with 2.5 in/out is exactly what we need.
josh, lets get a GB going for this
oh, and what kind of warranty does this come with? cause ive used a metal cat where the 3rd should be, that had substrate failures.
josh, lets get a GB going for this

oh, and what kind of warranty does this come with? cause ive used a metal cat where the 3rd should be, that had substrate failures.
These MagnaFlow universal spun catalytic converters utilize the revolutionary new catalyst technology. Using new manufacturing technology, MagnaFlow fabricates each converter body from a single CNC-formed and laser-welded tubular section, which is then spun into a round converter body shape. The MagnaFlow universal spun catalytic converters are literally manufactured around the catalyst, which is securely tucked inside and necks down to thicker-gauge material at the inlet/oulet for maximum durability. They are available in different-diameter inlets and outlets to match your specific exhaust system. Whether you need centered, offset, or angled, these MagnaFlow universal spun catalytic converters will fit any application.
I have to double check what the warranty is on the core from Magnaflow. On a side note I can tell you that if you're running water/meth then that will prematurely eat away a cat with a metallic core. My mechanic used to build custom Audi/VW turbo kits (cars making anywhere from 450-700whp) and they would always use water/meth and metallic cores and he said that it was just the nature of the beast that they would have to change the cat every 2-3 years due to the methanol deteriorating the cores. Now, most ppl don't have water/meth so it isn't an issue but for those who do it can be an issue.
I can do a Groupbuy. My intro price was $300 a unit. If we get 10 people I will do $275 plus shipping and if we get 20 people I will do $250 plus shipping. Shipping would range from $10-$15 to most locations. Start a list.
sounds good 
1. 04accordcpe
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
lets do this! like i said, those with the PCD's, this mod IS A MUST HAVE!! it will kill the rasp from running straight through PC's and get rid of the horrible exhaust smell

1. 04accordcpe
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
lets do this! like i said, those with the PCD's, this mod IS A MUST HAVE!! it will kill the rasp from running straight through PC's and get rid of the horrible exhaust smell
josh,
i HATE the smell of my pcds, but i can't seem to forgo the bumper in ponies; how well will these hold up with the pcds installed? is there something in the cat that could possibly fail or "go out" without the oem cats already filtering out some of the smell prior to the third cat?
i HATE the smell of my pcds, but i can't seem to forgo the bumper in ponies; how well will these hold up with the pcds installed? is there something in the cat that could possibly fail or "go out" without the oem cats already filtering out some of the smell prior to the third cat?

205 ft.lbs. - 172 ft.lbs. = 33 ft.lbs. Gain at 3000 RPM
Here is the graph from a 2006 Acura TL Base 6MT with the ATLP (VERSION 1) jpipe and *no* pcd. This is not my dyno chart. This chart is from the ATLP website.
I have the XLR8 jpipe, which is nearly identical to the ATLP Ver.1. The slight difference in design between these two is that the XLR8 has longer primary lengths. so in my opinion, the XLR8 should match (and probably do better) than this graph.
I can say from my first hand experience (at least in my case), that my gains "lived up" to what is shown in this graph. At the time that I installed my XLR8 Jpipe, I had *no* pcd yet. And my gains felt just like the graph illustrates.
i currently have the xlr8 resonated quad catback on mine alone with the atlp j pipe and test pipe, and the drone gets really annoying at some point so does the raspiness, now thinking about swapping out the test pipe for a high flow cat, not sure if it's gonna help ...oh , will the new xlr8 high flow cat bolt on the atlp j pipe without any issue??
i currently have the xlr8 resonated quad catback on mine alone with the atlp j pipe and test pipe, and the drone gets really annoying at some point so does the raspiness, now thinking about swapping out the test pipe for a high flow cat, not sure if it's gonna help ...oh , will the new xlr8 high flow cat bolt on the atlp j pipe without any issue??
thanks for the confirmation 04accordcpe, i am in for it then. i've been wanting to make a couple of videos and sound clips of the exhaust to share with everybody, but all the snow storms we've been getting here isn't helping at all, i guess i'll have to wait til it gets warm, then i'll do the before and after video with high flow cat...
sounds good 
1. 04accordcpe
2. HoolaTL-S
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
lets do this! like i said, those with the PCD's, this mod IS A MUST HAVE!! it will kill the rasp from running straight through PC's and get rid of the horrible exhaust smell

1. 04accordcpe
2. HoolaTL-S
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
lets do this! like i said, those with the PCD's, this mod IS A MUST HAVE!! it will kill the rasp from running straight through PC's and get rid of the horrible exhaust smell
come on guys, $250 is well worth it.
Thread Starter
Former Sponsor
iTrader: (1)
Joined: Mar 2004
Posts: 9,877
Likes: 624
From: www.ExceleratePerformance.com
I'm not sure what RV-6 uses for a brand on his cores but his cat also uses a 200 cell core.
The difference is in the construction, welds, and material used. I believe his are made in China, possibly Taiwan. On this part, exhaust flow might be similar since it's a pretty basic part with the same cell count on the core.
So I pulled the trigger on Monday and ordered the j-pipe and this high flow cat from XLR8, couldn't wait for the groupbuy and was already getting the spring mod bug.... Props to Josh for sending out same day, I had it in hand within 24 hours!!!
Anyway, did the install tonight....
Removal - OEM j-pipe was no issue, however, the OEM cat had the worst rust ever on the bolts and screws (I have a 2006)... had to cut them off which took forever, only issue with install.
To the sound...
Does not seem like there is a difference in tone at idle, if anything, minimal.
Regular driving, it sounds deeper than before, no raspiness, definitely smoother.
At WOT, very deep, aggressive and the response seems better as it doesn't seem congested or held back.
This was only gathered from 10 min of driving as it has been raining nonstop in MA with puddles everywhere and the last thing I need is for the CAI to take a dive.
Overall...the sound is delicious!!!
Cannot wait to finish off with the XLR8 Quad!
Was a little worried about the j-pipe hanging low (I have not dropped my car) but after install, it's somewhere between an inch or two lower than the plastic cover/shield next to it, no worries.
I will be driving all weekend so I'll try to report after with pictures/sounds and more feedback.
Will try to get some sleep now, although I feel like it's xmas.
Drive to work tomorrow could be shorter, but I'll make it twice as long just so I can enjoy it before going to cubicle land....
night
Anyway, did the install tonight....
Removal - OEM j-pipe was no issue, however, the OEM cat had the worst rust ever on the bolts and screws (I have a 2006)... had to cut them off which took forever, only issue with install.
To the sound...
Does not seem like there is a difference in tone at idle, if anything, minimal.
Regular driving, it sounds deeper than before, no raspiness, definitely smoother.
At WOT, very deep, aggressive and the response seems better as it doesn't seem congested or held back.
This was only gathered from 10 min of driving as it has been raining nonstop in MA with puddles everywhere and the last thing I need is for the CAI to take a dive.
Overall...the sound is delicious!!!
Cannot wait to finish off with the XLR8 Quad!
Was a little worried about the j-pipe hanging low (I have not dropped my car) but after install, it's somewhere between an inch or two lower than the plastic cover/shield next to it, no worries.
I will be driving all weekend so I'll try to report after with pictures/sounds and more feedback.
Will try to get some sleep now, although I feel like it's xmas.
Drive to work tomorrow could be shorter, but I'll make it twice as long just so I can enjoy it before going to cubicle land....
night
I currently have an XLR8 j-pipe and quad res exhaust with the stock cat in the middle. Does anyone know what gains I can expect by putting one of these in there?
This is particularly attractive since I can't be bothered with emissions problems come inspection time (hence no PCD or test pipes)
This is particularly attractive since I can't be bothered with emissions problems come inspection time (hence no PCD or test pipes)
Sorry guys, couldn't wait for the GB.
Already placed my order.
https://acurazine.com/forums/3g-tl-performance-parts-modifications-112/xlr8-hfc-ftw-765736/
Already placed my order.

https://acurazine.com/forums/3g-tl-performance-parts-modifications-112/xlr8-hfc-ftw-765736/



