If you would care to read through the 120 pages, you'd find that you can't put HFC's with these as they take up the space of both your stock header and cat.

Secondly, yes others have dyno'd these with an S/C. Notable theDreamer has them, and a GTM Stage 1 SC. They will not work with the Stage 2 SC as the compressor is too big.

I run them with the GTM stage I SC, 400whp & ~340TQ

I never said the HFC's would be a bolt up deal did I? It's just stainless piping. It cuts and welds just like any other pipe out there. Only reason I ask is these things sound like they add a considerable amount of noise since they are uncatted and I don't want a bunch of noise inside my car.

If you want the interior noise kept to a minimum than these might not be for you.

If you have any questions regarding any of my products, please do not hesitate to call me diorectly...

Thank you, Tony

I'm just kinda curious as to why we can get long tubes and catted pipes on f-body's and vette's but on these we can't. I think the hfc's would take out a loan of interior noise but still allow them to work to their full potential. But that's just my $.02. Carry on folks.

1. Kinda looks like you did... :ugh2:

They don't add any more noise than say if you went with Test Pipes, just a different type of sound, but the volume isn't any different. Actually, believe it or not, the LTH setup is actually Quieter than an HFC setup.

UPDATE-

Tommy G: 064, Chad L. (Non forum member): 065, Makram C. (Non forum member): 066

Thank you ALL for your recent orders!

HNGonzalez: 001 (Installed)
Semtex: 002 (Installed)
Daishi: 003 (Installed)
Mr. Anonymous: 004 (Installed)
Kolya: 005 (Installed)
The Dreamer: 006 (Installed)
LeonZ5: 007 (Installed)
Earwicker7: 008 (Installed)
Zello370: 009 (Installed)
Matrix_Square: 010 (Installed)
Dainedazz: 011 (Installed)
Cotizi: 012 (Installed)
Jason S. (Non forum member): 013 (Installed)
NYBladez: 014 (Installed)
Valentino: 015 (Installed)
res0zsfa: 016 (Installed)
Danny3.7: 017 (Installed)
Tardcore: 018 (Installed)
Booger: 019 (Installed)
PG6speed: 020 (Installed)
Jnaut: 021 (Installed)
Shultea1: 022 (Installed)
VH370ZNISMO: 023 (Installed)
Vipor: 024 (Installed)
E.Johnson: 025 (Installed)
Jamaica951: 026 (Canceled)
Bejan: 027 (Installed)
roplusbee: 028 (On hold, waiting for customer)
Vegitto-Kun: 029 (Installed)
jgb0311: 030 (Installed)
xwchriswx: 031 (Installed)
WesEngines: 032 (Delivered)
VA370Z: 033 (Installed)
Rooskey: 034 (Delivered)
Hassan A. (Non forum member): 035 (Delivered)
Fleece82: 036 (Installed)
AndrewKD16: 037 (Installed)
Pato C. (Non forum member): (Installed)
Rickey89: 039 (Delivered)
Reaper42: 040 (Delivered)
FL 4motion/Juno: 041 (Delivered)
One_Quick_Z: 042 (Delivered)
Ivo S. (Non forum member): 043 (Installed)
NewYorkJon34: 044 (Installed)
Jespir1: 045 (Delivered)
leighspped: 046 (Delivered)
AndrewC_31: 047 (Installed)
KPyburn: 048 (Delivered)
Ryanboy: 049 (Delivered)
Nismodean: 050 (Delivered)
NissanBoy: 051 (Delivered)
Blblack: 052 (Delivered)
Cambinese: 053 (Delivered)
german77: 054 (Delivered)
Peppers: 055 (Delivered)
Nism0370: 056 (Delivered)
PCB370Z: 057 (Delivered)
David T. (Non forum member): 058 (Delivered)
Elitle Auto Service: 059 (Delivered)
MTAxelson: 060 (Building)
V8Killer: 061 (Building)
My_third_Z: 062
Elite Auto Service: 063
Tommy G: 064
Chad L. (Non forum member): 065
Makram C. (Non forum member): 066

Mine have been installed since this spring and I have been loving every second of it :)


Just FYI







DAN

61 what what!!

Please..check my PM..

Best exhaust mod I have on here thus far. Doesn't throw a check engine light and I recently passed inspection in New York, of course they didn't look under. I have the distinction of being the loudest car in NY short of those running open dumps.

Tony your list is out of date, mine has been installed for quite some time, it's listed as "Blblack" on your list :)

Who runs open header? That would get old real quick!

bumping this thread.

Just saw another thread where someone was asking about putting in the FI LTH with the Motordyne XYZ pipe that comes with a cat.

Was wondering if anyone has done this. How much of the gains from the LTH would be diminished by adding a cat to the system?

Video please? :D

so tempted to buy used and place these on a 350...

bumping my question. yes inpatient

It may have been my thread from a couple day's ago. Every time ask that question I always get a reply with "Can't be done, LTH replace the cats" and I'm thinking to myself... "I wouldn't have asked the question if I had not found the solution and PRESENTED it very articulate english... :google:
When I get back from my tour, I'm slapping those bad boy's on.... or someone else. Demon bolt sounds terrifying.

lol yeah it was your thread I was referring to. And yeah I noticed the first couple posters said exactly that: you can't get LTH with hfc blah blah blah. Lots of people are lacking in the reading comprehension department unfortunately:icon14:

Let me know how it works out once you get everything installed. I may even get it done before you lol, just gonna wait and see if that new motordyne exhaust with the cat comes out soon. But I have also been looking for a nice y-pipe back exhaust to complete the set up if I end up going with the LTH and motordyne XYZ pipe. but the only nice one I have seen so far is that titanium amuse one which costs like $3k:ugh2:

Yeah, you just might haha. I could easily buy it if I were not funding the wedding. Once I know I'm in the clear and I'm back home, I'll be putting those on order and greasing up those bolts and especially that demon bolt. I'll probably get a base dyno done before install, then dyno after install, maybe give her a few weeks. I'm thinking I may need to get the ecu tuned as well with the changes.

just for some good news, you have have to mess with this " demon bolts" if you doing LTH's as you pull the factory manifolds and cats out coupled together.

For those interested, got to take Abby out for a few laps on a track, figured I'd post it here since that way for those interested in the actual metered volume of the exhaust, you have an example.



As tested, came in at 93.8dB. :tup:

Long Tube Headers, 18" Res SS CBE

bumping question again... would really like to see if anyone has done this yet

It will prolly be just as if you didn't even have it installed, since you're just relocating the same restriction. I really hope you don't spend the money for headers just to negate their purpose with a Cat in your exhaust. :ugh2:

That doesn't make sense to me. You are still improving exhaust flow regardless. I can almost guarantee that a LTH with HFC will outflow testpipes and HFC because it is leaving the headers more efficiently. Granted the difference may be academic, but they will always come out on top.

Ok, so you're looking at spending $1500~ for 3-5 extra hp over a HFC setup?

If you're talking about doing that, save yourself some $$$ and get the Stillen headers and HFC's...

Do you really think a single high flow cat would completely negate the gain from the LTH? Maybe I am wrong but it looks like the LTH increase power substantially throughout the whole power range. How much would the cat on the XYZ pipe restrict air flow that it would cancel out the LTH completely?

The same reason there are 2 cats on the Z already... You're asking all of that exhaust to go through 1 cat. Unless you're talking a 3" pipe back... You're going to have a lot of restriction at the cat entry point. And that backfill will prevent flow... and thus, neutralize power. That's great that you get it out of the engine efficiently, but it's just like on the highway asking all of that to go to 1 cat. Back up is inevitable.

It is a 3 inch pipe connected to a 3 inch cat. The hp loss from that cat in comparison to no cat would be minimal. Maybe a 3-5 hp loss at it's worst. I already ordered LTH's, I'll be getting the motordyne Y pipe w/ cat next month, and the CBE afterwards. It's a bit backwards :P but I got a killer deal on brand new LTH's and the y pipe is more than half the price as the CBE's. It probably won't be installed until Feb unfortunately because I'll still be out of the country till then. It will be like christmas... funded by me and for me.

And please don't take anything to heart because we both know our answers are hypothetical until proven. I also completely agree that LTH's are not worth it for most people and "similar" gains can be achieved going a different route. IMHO, nothing beats the sound of a nice car that has a full exhaust setup with long tube headers. That scavenging sound, the crackles, and burbles to my ears are priceless.

UPDATE-


HNGonzalez: 001 (Installed)
Semtex: 002 (Installed)
Daishi: 003 (Installed)
Mr. Anonymous: 004 (Installed)
Kolya: 005 (Installed)
The Dreamer: 006 (Installed)
LeonZ5: 007 (Installed)
Earwicker7: 008 (Installed)
Zello370: 009 (Installed)
Matrix_Square: 010 (Installed)
Dainedazz: 011 (Installed)
Cotizi: 012 (Installed)
Jason S. (Non forum member): 013 (Installed)
NYBladez: 014 (Installed)
Valentino: 015 (Installed)
res0zsfa: 016 (Installed)
Danny3.7: 017 (Installed)
Tardcore: 018 (Installed)
Booger: 019 (Installed)
PG6speed: 020 (Installed)
Jnaut: 021 (Installed)
Shultea1: 022 (Installed)
VH370ZNISMO: 023 (Installed)
Vipor: 024 (Installed)
E.Johnson: 025 (Installed)
Jamaica951: 026 (Canceled)
Bejan: 027 (Installed)
roplusbee: 028 (On hold, waiting for customer)
Vegitto-Kun: 029 (Installed)
jgb0311: 030 (Installed)
xwchriswx: 031 (Installed)
WesEngines: 032 (Delivered)
VA370Z: 033 (Installed)
Rooskey: 034 (Delivered)
Hassan A. (Non forum member): 035 (Delivered)
Fleece82: 036 (Installed)
AndrewKD16: 037 (Installed)
Pato C. (Non forum member): (Installed)
Rickey89: 039 (Delivered)
Reaper42: 040 (Delivered)
FL 4motion/Juno: 041 (Delivered)
One_Quick_Z: 042 (Delivered)
Ivo S. (Non forum member): 043 (Installed)
NewYorkJon34: 044 (Installed)
Jespir1: 045 (Delivered)
leighspped: 046 (Delivered)
AndrewC_31: 047 (Installed)
KPyburn: 048 (Delivered)
Ryanboy: 049 (Delivered)
Nismodean: 050 (Delivered)
NissanBoy: 051 (Delivered)
Blblack: 052 (Delivered)
Cambinese: 053 (Delivered)
german77: 054 (Delivered)
Peppers: 055 (Delivered)
Nism0370: 056 (Delivered)
PCB370Z: 057 (Delivered)
David T. (Non forum member): 058 (Delivered)
Elitle Auto Service: 059 (Delivered)
MTAxelson: 060 (Installed)
V8Killer: 061(Delivered)
My_third_Z: 062 (Delivered)
Elite Auto Service: 063 (Delivered)
Tommy G: 064 (Delviered)
Chad L. (Non forum member): 065 (Building)
Makram C. (Non forum member): 066 (Building)

:iagree: Just a hint of rasp to let you know it's not stock. But not a fart can honda sounding.

I cannot let this thread die :tup:
Who has LTHs or FI TPs for sale?

stock headers + high flow cats vs fast int. headers=7 hp gain ???
 

I can't read all 1,831 posts, so if this was pointed out, then I'm sorry for asking. Was there a test done with stock headers + test pipes vs Fast Intentions headers? I think test pipes might be 6 to 11 hp better than high flow cats. Test pipes + intallation is much cheaper than headers + intallation. That would change everything. Unless of course I'm missing something.

Nice!

The testing for the headers in December 2009 was not done from test pipes to headers only HFC's to headers.

Now when we originally tested our exhaust in July of 2009 we tested the test pipes vs. HFC's. The peak gains of the test pipes were slightly higher than the HFC's.

I hope that answers your question. If you have anymore questions please do not hesitate to call me directly...

Thank you, Tony

PM me a price with these and a Cf cat back tony! :driving:

HE'S BACK!

Where have you been? I saw your PM and I will get back to you shortly.

Thanks, Tony

Lookin forward to hearing from you!! My Z sounds to tame... especially after the setup I had on my G.. Hit me back soon!

Blake,

It is good to hear from you my friend. It has been a while. I am glad to see that you are now in a Z. The G was not slouch either though!

Let's talk tomorrow when i am back in the shop. I will try to either PM you or call you. If it gets late in the day and you have not heard from me, just give me a ring...

Thank you & Merry Christmas,

Tony

Sounds great!! Lookin forward to it