So who wants in on this??

 

Go ahead and put me down for the 1 3/4 w/ 3" collector.

The other thread says we order online, how is this one going to work to order?

 

Just picked up a set last week.

 

i am out for this one, decided to go for 2". it's what i need..

 

Bump for interest.

 

Bumping this! Post up if you're interested! We'll wait til we have a good amount of people (5+) committed to propose this to HAWKS!

 

What's the going rate for these right now?

 

http://www.hawksthirdgenparts.com/ha...ocats-1-1.aspx

 

OUCH!!!!!!!!!

Hahahhaha! Well, I asked, didn't I?

They look nice, but for the price I think I would not buy them for my next project since I intend to sell it. If I do an LSx swap in a keeper, I would buy them.

Selfish, but hey, you would not get your investment back in a resale of an engine swap car. You definitely WOULD get your money back if it was in your own car that you kept 10 years or forever.

You guys out there with the LSx swaps that are keeping your cars, you should be signing on for this...

Just my opinion...

 

I'll buy another set when I find another nice roller to build for my wife.

 

I'm in for 1 3/4 w/ 3" collector but don't know when I can actually go through with it lol!

 

Ideally, we'd all agree on a certain date. Perhaps in the next 6 months.

 

I'm interested. Not sure yet if it's worth it for my build yet. How much of a gain with a cam vs. stock ls1 manifolds on 5.3? What kind of deal you think we can get with a gp?

 

Longtubes will make the most out of any mod you do. Not sure on the deal we may get, that will have to wait til we have "x" number of committed buyers.

 

Hello,
What would be the group rate?

 

Dont know about a group rate yet, however the last deal was free shipping and free gasket/bolt kit with the headers.

 

Hello,
Has anyone on here used these yet? Seems like an alternative to hawks, maybe......

http://www.brphotrods.com/mm5/mercha...gory_Code=CNV3

 

I'm interested in a set but if I decide to buy it will be within the next month. Can't wait much longer than that.

 

Hi all! It's Jeni, I am now back at Hawks after a 2 year "vacation". Some of you may remember me and some may not. I will now be running the Group Purchasing Department at Hawks. Yes, there is now a department that will solely focus on GPs for clubs/forums and keeping retail out of the mix.

With that said, here goes...

As a "group" if we can get 10 buyers, I am offering the LSX swap headers with 1 5/8" primary with 3" collector. This application DOES hold a proper fitment for both automatic and manual transmissions. This application will NOT include a Y-pipe with the sale. You will need to supply your own y-pipe as this is headers only. The headers ARE STAINLESS. Now for the best part....STAINLESS LSX SWAP HEADERS for $499.00 per set plus shipping.....Quality with out compromise and a price that is unmatched for A-1 quality. We will offer you one on one Terchnical assistance with Bruce for any questions that you may have relative to the Y-pipe. Keep in mind that in order to offer this to you all we will need minimum of 10 initial orders. It gets better get 11-15 people buying the headers in on this deal and you will get them for $449.00 per set plus shipping. So, I will offer them at an additional $50.00 off!

Any questions regarding this GP, e-mail me DIRECT at jeni@hawksthirdgenparts.com, I will reply to you in a timely manner. I do not operate out of the Hawks Third Generation HQ, so calls to the office will then be directed to e-mail me. We are working on having a phone system set up for GP HQ asap.

*****Any additional individual items added to each buyers order may also extend discounts************* CHA-CHING

Thanks so much for your time. I look forward to assisting you with your GPs

Jeni

 

How about 1 3/4 primaries?

 

Hello,
I will be needing these also. And will they clear a t56 trans?

Thanks,
Robbie

 

Yup, I need at least 1 3/4 primaries too>>> Damn good price on the 1 5/8 primaries though.

6.2 L92 Swap

 

FYI************(Jason, I borrowed this from our e-mail)

What cubic inches is your motor and what RPMs are you pushing? The reason why I ask is unless you are over 383 and pushing more that 6500 with 3” and 1 5/8 you will retain more on your bottom end with your mid range torque. Let’s say that you are stock and put on a 2” it will breathe so well that you will end up losing a good bit of your torque on your bottom end. Not sure that you want to do that. *************

Now, I will check on the pricing that I can offer to you all to do a GP for the 1 3/4 and get back to you all in the morning. Keep in mind, either way, we need 10 sets sold to do this GP.

Thanks,

Jeni

 

I'm in for a set. If you say the 1 5/8's are fine and will work, I'm ok with that.

 

Does anyone have any empirical data on the 1 5/8" primaries as they compare to the the larger primaries headers?

 

back to back tests on ls1tech have shown 1 3/4" to be down on power over 1 7/8" on some texas speed headers with a cam only ls1. I believe the crossover point was somewhere in the 3k rpm range for the bigger tubes making more power. If it was me I'd be doing 1 3/4" minimum on these motors.

 

Ok... just how much h.p. are we talking being made from an increase of 1/8" in diameter? Also was the performance up top sacrificed to torque down low?

 

I have L92 heads and I just measured the inside diameter of the exhaust ports to be 1.58" I have to say I am a little concerned about exhaust port and header overlap. The 1 5/8" header only allows a tolerance of +-0.0225" with my heads. This will be the first set of headers I am buying, so I admit I am a little green, and I'm not sure how easy it is to keep tolerances when manufacturing these. Forgive my ignorance, I'm just trying to get as much info as possible before I commit to these.

 

Hey Jbone,

Send me a direct e-mail with a way to contact you directly, please:

jeni@hawksthirdgenparts.com

I will have Bruce personally call you for Tech Assist.

Thanks,

Jeni

 

They will clear

 

What about mounting hardware and gaskets?

 

Feb's GP offer:

http://www.hawksthirdgenparts.com/ha...beheaders.aspx
*****2" Primaries with 3" collectors 20% discount makes them $960.00 add $40.00 for header gaskets and bolts. RETAIL PRICE IS $1200.00


http://www.hawksthirdgenparts.com/ha...headers-2.aspx
****1 5/8 Primaries with 3" collectors $499.00 for 1-10 purchases $449.00 for 11 purchases and up plus shipping same rates as above> add $40.00 for header gaskets and bolts. RETAIL SALE PRICE IS $699.00


http://www.hawksthirdgenparts.com/ha...ocats-1-1.aspx

*****1 3/4 primaries with 3" collector> (10 % off ) $755.10 GP add $40.00 for header gasket and bolts. RETAIL IS $839.00

shipping IS ADDITIONAL and ranges from $45.00 Eastern US, $55.00 Central, $65.00 Western US.

Y-PIPES ARE NOT INCLUDED


HERE IS THE DEAL:

IN ORDER TO EXTEND THE PRICES LISTED, EACH ITEM/SIZE PRIMARIES MUST HAVE MINIMUM OF 10 PURCHASED. I cannot mix the sets to get the minimum. I am offering what you asked for at a much lower price FOR MEMBERS ONLY. This is not Joe down the road"s regular retail price. I did throw in the 2" inch primaries as an additional offer for anyone who may be interested and the price is ridiculously LOW.

E-MAIL me DIRECT at jeni@hawksthirdgenparts.com, I will need a telephone to contact you directly. I do not work out of HQ, but will be calling you from there to confirm orders, car info, etc.

All orders and payments will need to be made/received by 2/28/11, NO exceptionsThanks
Jeni

 

$40.00 for bolts and gaskets. I posted just after you and included that in the information. Check out my post. I have offered 3 different size primaries on the GP

Thanks
Jeni

 

Thanks for the breakdown in prices/info. Hope I can make this GP

 

You are welcome! Hope to see you on board

 

Was there a conclusive answer to the need of a 1 3/4 vs the 1 5/8?

I haven't worked out a combo yet for my LS1 swap, but probably keeping it at a 346 with a mild head/cam combo + some nitrous. Will 1 5/8 be sufficient still?

I'm in for whichever, but it sounds like 5/8 may work.

BTW - I like that there is a dedicated staff working on this stuff. I'm sure Bruce/Stephen are too busy to keep up with all the demand.

 

From John Lingenfelter’s book “On Modifying Small-block Chevy Engines”

Exhaust: You can think of the exhaust system as similar to a backwards intake tract. The primary header tubes are similar to a backwards intake tract. The primary header tubes are similar to intake runners, while the header collector is not much different than the plenum of the intake manifold. With that in mind, it would make sense that choosing headers would be somewhat similar to choosing an intake manifold. Therefore, increasing header primary tube diameter (1 3/4 in for a 350 for example) would tend to enhance power in the upper rpm ranges while perhaps hurting power slightly below peak torque. Conversely, the typical 1 5/8 inch primary pipe header would enhance power at lower rpm street-oriented peak torque while contributing less to peak horsepower.


Lingenfelter's comments are pretty much in line with the research I have done as well as what Bruce from Hawks has told me. So from what I gather, on a moderately built LS engine, the 1 5/8 should be great. I would think that they might get a bit restrictive with nitrous. I'm leaning toward the 1 5/8 headers myself. I'm not really willing to spend $300 extra for un-noticeable hp gains. That's just me though, and I'm building a fun daily driver, not an all out race car. Plus I'm a cheap college student.

 

@OUTATIME GTA- If you are using the set up with a 346 and adding nitrous and only doing 100 shot the 1 5/8 will prove to be a better set up for you. However, if you are using 300 shot you should go with the 1 3/4

***We did a car that did 550 at the rear wheel that had a Cam/Supercharger Magna Charger with a 346 using the 1 5/8

***Thank you. They are busy, not too busy that they will not gladly assist you. However, Bruce does not want to spread thin and not offer quality assistance to the "customer". My having previously worked for him and knowing a large amount of the customers helps already having built a relationship and reputation. Makes sense to have someone dedicated to forums that does not have to also work with the general public.

 

Im dwon for the 1 5/8 headers lets do this **** boys

 

1badeagle-please e-mail me with your name and telephone number in respect to your forum i.d.

jeni@hawksthirdgenparts.com

Thank you!
Jeni

 

I've read quite a few threads on ls1tech.com that say 1 7/8" primaries don't lose any torque compared to 1 3/4" primaries but gain some up top. I'd be very interested to see a back to back dyno test of the different Hawks headers on stock LS1. If 1 7/8" primaries don't lose torque compared to 1 3/4" I wouldn't be surprised if 1 5/8" primaries are down significantly on power and don't gain any torque

 

Any dyno charts of the above data from ls1tech.com that you could post the links to?

 

No just often see posts saying dyno results showed no loss of torque with 1 7/8" primaries. They did say they were different brand headers so that could be a factor.

 

In an previous post, HAWKS said if you are going to do H/C/I on the ls1 to go with the 1-3/4" headers.

 

Forgive my ignorance, but what is "H/C/I"?

 

Heads, cam, intake

 

how many people do you have on board so far?

 

You will order by sending me a direct e-mail at jeni@hawksthirdgenparts.com with your contact information. I will call you to confirm the order(s).

Thanks
Jeni

 

3 confirmed on 1 5/8 and 2 confirmed on 1 3/4 with one addition for "possible"

Thanks
Jeni

 

Hello,
I will take a set of the 1 3/4 headers.

Thanks,
Robbie Sheffield
robbiesheffield@yahoo.com