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Old 04-23-2013, 12:09 AM   #51
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what size of catback work better with 1 7/8 LT headers , 2.5" or 3" catback ?
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Old 04-23-2013, 05:28 AM   #52
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what size of catback work better with 1 7/8 LT headers , 2.5" or 3" catback ?
That depends on how much power you are making. It makes no difference up to about the 600rwhp range. At that point you need 3 inch but below that either is fine.
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Old 04-23-2013, 09:52 AM   #53
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1 7/8" is definitely sufficient for the vast majority of Camaros running around out there.

No one is suggesting 400 series stainless steel is so poor that it will quickly fall apart or fail. It is OEM grade so it will have a decent service life. It will surface rust pretty quickly though and it may have to be replaced at some point while you own the car. Neither of those will ever happen with 300 series. It is a give and take like anything else.
Right on!

I have ALWAYS done ceramic coating on my headers so I have never worried about surface rust. Thanks for all the info!
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Old 04-23-2013, 10:40 AM   #54
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what size of catback work better with 1 7/8 LT headers , 2.5" or 3" catback ?
Realize that almost all of the aftermarket cat-back systems are designed to bolt up to a stock mid-pipe. Due to that fact they are going to have a 2.5" inlet. For example, I run the Magnaflow 3" (16483) system. That system starts off with a 2.5" inlet and then goes to 3" shortly after the connection point. On the same token pretty much every LT header out there is going to have a 2.5" connection point at the end of the collector. Again, so that they can connect up to the stock cat-back if need be.

So, unless you buy a true 3" system (I think only LG and KOOKS have them) then you're going to have a 2.5" bottle neck any way.

With that being said, unless you are making big HP, you'll never see or feel this slight restriction. There are tons of fast Camaros that have the 2.5" inlet to a 3" system. Don't concern yourself in that bottle neck. There are so many other variables like weather conditions that will make a more significant difference that I wouldn't even think twice about it (unless you're making really big HP....maybe 700+).

So, what do you get in the difference of a 2.5" system all the way out vs a 2.5" inlet/3" system.......Sound. The 3" systems are going to have a little bit deeper rumble especially on start up and idle. I would lean towards a 3" system just for that reason but a 2.5" system will do you just fine.
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Old 04-23-2013, 11:02 AM   #55
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i have Headers with magnaflow 3" (16483) it's sound nice deep , some guys says the headers with 2.5" catback gives better pressure of flow than 3" catback but nice to know there is no different ..
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Old 04-23-2013, 11:35 AM   #56
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ARH 1 7/8's, high flow cats and Magnaflow (one muffler) cat-back was on my WS6. It sounded nice not loud and raspy but deep and smooth. I recommend those two. And yes HP gain too: I think 35hpand 25tq with this etup.
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Old 04-23-2013, 12:14 PM   #57
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I just want loud so I'm doing long tubes .. I have straight pipes just Dk kno if I should go catless or not and get an x pipe
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Old 04-23-2013, 02:27 PM   #58
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ok , if i found some work shop doing headers for cars how i know they use a good stansteel or cheep ? ok sure they gonna say we use it !!
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Old 04-23-2013, 02:36 PM   #59
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Do they build headers or just sell and install them? If they sell them, ask what brand. If it is an unknown brand, ask them what grade of stainless steel are they built from. If the shop builds them, ask them what grade of stainless they use. Compare what you are told to the OP.
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Old 04-23-2013, 02:54 PM   #60
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they build headers , as i know the best grade is 409 , i'll ask them

but if i see this steel can i know wich grade it's like shape or thickness of the piece ?
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Old 04-23-2013, 03:13 PM   #61
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No...304 is the preferred for headers. The stainless steel is usually stamped with the grade. You could ask to see a piece that has the stamping. Or, you could ask for a copy of their receiving document that lists what they were sold (Not sure if they will let you see that). There are other ways such as chemical tests, magnets (it won't stick to most 304 although it is not absolute), or lab certification test reports for the stainless that is being provided to the shop by their vendor.

Just curious, if you have to go to that extent to make sure they are using the right stainless, why do you trust them to build your headers???
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Old 04-23-2013, 08:00 PM   #62
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Got a price for ARH catless with an x pipe and gt55 spark plugs and a dyno.... For 3,050 is that a good price ???
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Old 04-23-2013, 08:00 PM   #63
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I already have straight pipes
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Old 04-23-2013, 08:08 PM   #64
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Full header and exhaust system? What size primaries? Installed? How many dyno pulls?
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Old 04-23-2013, 10:16 PM   #65
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Full header and exhaust system? What size primaries? Installed? How many dyno pulls?
It's 1 n 7/8 just the long tubes and x pipe then you dyno it to tune it basically
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Old 04-23-2013, 10:17 PM   #66
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Prob three though
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Old 04-24-2013, 12:55 AM   #67
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No...304 is the preferred for headers. The stainless steel is usually stamped with the grade. You could ask to see a piece that has the stamping. Or, you could ask for a copy of their receiving document that lists what they were sold (Not sure if they will let you see that). There are other ways such as chemical tests, magnets (it won't stick to most 304 although it is not absolute), or lab certification test reports for the stainless that is being provided to the shop by their vendor.

Just curious, if you have to go to that extent to make sure they are using the right stainless, why do you trust them to build your headers???
sorry yah 304 i mean , i have headers but just i'm asking for experince , it's good to know this info.. thanks
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Old 04-24-2013, 01:38 AM   #68
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Great information and I cannot wait to see the stepped information. I went with the JBA 1 7/8" Stainless & Ceramic Coated Long Tubes and they also have a "MERGE SPIKE". I paid $800.00 for the headers and mids shipped and it was the best deal on the market at the time. I have used JBA in the past with NO issues and the Camaro headers have been great.
Hey where did u but them that cheap? I've looked and the cheapest I found was like 1k
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Old 04-24-2013, 07:59 AM   #69
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It's 1 n 7/8 just the long tubes and x pipe then you dyno it to tune it basically
The way ARH sell them on their site is a full system with an X-pipe. The options are: with or without cats; then with or without mufflers. So, you have straight pipes (no cats). That system, without mufflers, lists for $1,775. If you get mufflers, the price is $2,650. Are you getting mufflers?

Not sure what those plugs cost but let's just toss in another $80

Three dyno pulls....a conservative $200

Typical header installation cost about $250-$300

What I come up with is:
No mufflers; about $2,350
Mufflers; about $3,200

So, if you are getting mufflers, $3,050 sounds reasonable. If you are not getting mufflers.....not so much. If you could find out what they are selling the header & exhaust system for by itself, you could get a better idea if their price is good.

Hope this helps.
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Old 04-24-2013, 09:28 AM   #70
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The way ARH sell them on their site is a full system with an X-pipe. The options are: with or without cats; then with or without mufflers. So, you have straight pipes (no cats). That system, without mufflers, lists for $1,775. If you get mufflers, the price is $2,650. Are you getting mufflers?

Not sure what those plugs cost but let's just toss in another $80

Three dyno pulls....a conservative $200

Typical header installation cost about $250-$300

What I come up with is:
No mufflers; about $2,350
Mufflers; about $3,200

So, if you are getting mufflers, $3,050 sounds reasonable. If you are not getting mufflers.....not so much. If you could find out what they are selling the header & exhaust system for by itself, you could get a better idea if their price is good.

Hope this helps.
I went down to tune time in lake wood here's the print out below .. I already have straight pipes from my o2 sensor back so all I need is the long tubes with no cats and then an x pipes then they are putting gt55 sparks in .... For 3k
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Old 04-24-2013, 09:40 AM   #71
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Can't wait for the stepped header thread. Great topic.
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Old 04-24-2013, 10:28 AM   #72
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Can't wait for the stepped header thread. Great topic.
Here it is http://youtu.be/ASLpy00BZrw
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Old 04-24-2013, 10:31 AM   #73
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I went down to tune time in lake wood here's the print out below .. I already have straight pipes from my o2 sensor back so all I need is the long tubes with no cats and then an x pipes then they are putting gt55 sparks in .... For 3k
From the price on the headers and exhaust it doesn't look like they are giving you a good price but I have not priced ARH in that much detail. Maybe the prices from ARH are not flexible? I was way off on the plugs (they are very inexpensive) but I wouldn't use them. I would stick with the AC Delco. I think they could work with you on the labor a bit since you are getting so much done. It just looks like rack-rate (high) pricing across the board. I am not saying they are not worth it, it just seems that way. Good luck!
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Old 04-24-2013, 10:44 AM   #74
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From the price on the headers and exhaust it doesn't look like they are giving you a good price but I have not priced ARH in that much detail. Maybe the prices from ARH are not flexible? I was way off on the plugs (they are very inexpensive) but I wouldn't use them. I would stick with the AC Delco. I think they could work with you on the labor a bit since you are getting so much done. It just looks like rack-rate (high) pricing across the board. I am not saying they are not worth it, it just seems that way. Good luck!
Yea it's one of things all nice cars in the shop all serious builds... And you wonder why then the bill comes in I don't know I feel like at least I kno it's done right but I have a lot of other prices from other ppl half of that amount
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Old 05-07-2013, 07:18 PM   #75
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Can't wait for the stepped header thread. Great topic.
It is in the works along with many others.
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