Generally speaking, long tube headers produce more HP. Price is a bit better, and some just like the path less travelled.
Complete exhaust system option, Headers to tailpipe? (1 Viewer)
- Thread starter petrotk40
- Start date
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Hokie LX
SILVER Star
FYI, I hope you ordered the correct headers for the 06-07 trucks as they are different than the 98-05 trucks. The THY-561-SS-C part number is for the earlier trucks.
Congrats on the parts on order though. I'm sure you'll love them
True that. 561 is for non SAI.
562 is for 06 and 07 (and some 05 depending manufacturing date)
I'm just looking into all this now. My original exhaust is about to fall off and the last trip nearly ended it for good. I was originally just going to do the Catback portion. Is it worth it to go ahead and do the headers as well? And at that point do I just replace the cats too? How much of this is a "while you're in there" deal? How slippery is this slope? (Also, I'm not super excited about 2 grand worth of exhaust just for the fun of it.)
Thanks!
Edit: I'm not gonna touch the catalytic converters 'til they fail. Too expensive! Yikes!
Edit again: I found answers to all my questions! Doesn't look like the DT headers are gonna be easy to get and emissions issues in CA add a wrinkle. Cat back is all I will tackle at the moment. Cheers!
Thanks!
Edit: I'm not gonna touch the catalytic converters 'til they fail. Too expensive! Yikes!
Edit again: I found answers to all my questions! Doesn't look like the DT headers are gonna be easy to get and emissions issues in CA add a wrinkle. Cat back is all I will tackle at the moment. Cheers!
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Thanks! I’ll double check.
Hokie LX
SILVER Star
Yup, that’s correct. Just FYI, if you haven’t seen the other threads, Doug Thorley takes orders for these but doesn’t do a production run until they hit a certain number of orders. Some folks have had orders in for months waiting. I proposed in another thread that someone reach out to ask about a group buy to see if they can recruit enough orders to get them to do another run. Just an idea.
we just did this for the earlier trucks and I placed my order through the group buy. We hit 30 orders.
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LCMoneyPit
SILVER Star
I just got a notice from dougthorley.com that they're officially out of business. Their website says that same thing. But the dougthorleyheaders.com site is still up. Does anyone know if these are 2 different companies?
94SRUNNER
GOLD Star
I am on their website now, and do not see that notice?
LCMoneyPit
SILVER Star
It's this site: http://www.dougthorley.com/. I had an order for headers THY-562-SS-C pending for the last few months, then just got a notice today from customerservice@dougthorley.com telling me my order is cancelled and they're permanently out of business. Maybe those 2 aren't affiliated? Now I'm wondering where my order actually went if not to the real DT. Weird.
94SRUNNER
GOLD Star
So there are two Doug Thorely company's? Because Best Performance Headers | Truck Headers | Vehicle headers | Exhausts - http://www.dougthorleyheaders.com/ looks like they are still in operation?
LCMoneyPit
SILVER Star
Must be I guess. I thought I had ordered with the real DT. Tried calling the number at Best Performance Headers | Truck Headers | Vehicle headers | Exhausts - http://www.dougthorleyheaders.com/ a few times and can't reach anyone.
jLB
Another one followed me home. Can we keep it?
From the Wayback Machine, I see "Presented by BNR Performance"... That would make me suspect that dougthorley.com is a somewhat slimy reseller that jumped on the domain. Maybe related to Bad News Racing? Welcome to Bad News Racing - - https://store.badnewsracing.net/crm.asp?action=contactus
(I'd suspect DougThorleyHeaders.com is the company that you really want to be dealing with...)
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LCMoneyPit
SILVER Star
Ok, an update and good news. I got through to the real Doug Thorley Headers, and they moved my order over to a direct order from them. So I'm back in line for when they do a production run of the THY-562-SS-C headers. The dougthorley.com folks were a reseller with a really confusing name.
I ordered a set of THY-562-SS-C through Summit on 3/1/2021. They were originally set to ship in April, but after repeated delays I finally called Doug Thorley direct last night (5/17/2021).
The woman I spoke with said the material had not been delivered, and was scheduled to arrive in June, with the finished headers expected to be delivered sometime in July.
Not sure I believe them, but thought I'd share.
The woman I spoke with said the material had not been delivered, and was scheduled to arrive in June, with the finished headers expected to be delivered sometime in July.
Not sure I believe them, but thought I'd share.
94SRUNNER
GOLD Star
Considering availability of raw materials in general, I am not overly surprised with their delays. As for the their finished product delivery schedule...I am sure they. like so many other manufactures are experiencing severe backlog
I received an update from Doug Thorley today. They said orders will begin shipping within the next week.
Eyedaho
SILVER Star
In the full exhaust kit they show cats. Are you thinking OEM cats wouldn't fit though?Mind me asking... Why long tube?
The cats won't fit and you are looking at a custom installation. Just wondering.
Eyedaho
SILVER Star
How was the shipping quote? I put the whole exhaust kit in my shopping cart, but I didn't want to check all the way out to get the quote sent.
The PM should make more power all throughout the RPM band. As you say whether it's a negligible difference or a big bump is unknown until someone tries it out. Long tube headers are preferred for all engines but due to being...longer...they are harder to package into a car, or scrape the ground on a low riding muscle car or stuff like that. Shorty headers were created to bridge the gap between a factory style exhaust manifold and full length long tube headers.
So who knows. If someone cuts out my catalytic converters I will use insurance money to buy the Aussie kit. They can be installed onto a VVTi engine but the SAI ports would need to be blocked off somehow. My preference would be to remove the heads and rebuild them with cams and big valves and weld up the SAI ports at the same time, or maybe a sealing plate could be welded onto the header flange. Trying to figure out if I can time that with my next timing belt replacement so at least I have an excuse as to why I'm tearing apart my perfectly running engine.
