Doug Thorely Headers - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Monsterrat · 04-08-2005, 11:18 AM

Anybody have anything to say about Thorely's headers? I hate my hookers' and I have a friend that LOVES his Thorely's. They looks *****en and seem to be quality(IE cleanest welds and great flanges/gaskets). I've never heard anything bad about them and wonder if there is a reason I never hear anything.

Thanks Guys!

CHEVYE · 04-08-2005, 11:29 AM

i don't have them but my neighbor has a set on his 67 camaro. they are pricey but he says he'll never run anything else. what kind of issues are you having out of the hookers? i've never had a problem out of em.

junkyardjohn · 04-08-2005, 11:37 AM

I PUT A SET OF DOUG THORLY TRI-Ys ON A 71 WITH A S/B, & THEY WERE GREAT HEADERS. THE FIT & FINISH WAS GREAT. THEY WERE A LITTLE SPENDY THOUGH, BUT FROM THAT POINT ON.. ALL I WILL EVER USE IS THORLYs OR HOOKER SUPER COMP. THE CHEAPER HEADERS ARE A LESSON IN FUTILITY, & I WON'T USE THEM, EVEN IF SOMEONE GIVES THEM TO ME FOR FREE.

JOHN

71Longbed · 04-08-2005, 12:30 PM

that dougs are great a nice and thick flange and look great too

GMan69 · 04-08-2005, 01:27 PM

Overall, I've been pleased with the tri-Y's. Thicker mounting flanges and heavy-guage tubing makes for better durability. They've been on my daily driver for 2 1/2 years. No exhaust leaks and no rust- through. If I had it to do over, I would have gotten ceramic coating rather than chrome. The chrome blued about 2 minutes into my initial startup. If appearance matters, go with ceramic. Additionally, the passenger-side header is a little close to the starter. I wrapped my starter (mini starter actually) with foil-backed fiberglass insulation as a heat barrier. On the driver's side, one of the tubes is kind of close to the lower A-arm shaft (where the grease fitting is). Not problematic, just close. All this considered, I selected them mainly for durability for a truck that is driven regularly and I'm glad I did.

jetfixr · 04-08-2005, 04:29 PM

The guy at the speed shop said he wouldn't go with anything else but Doug Thorleys on my truck. He said they fit the best and you never have to mess with them. Of course, I had a bit of heartburn when he told me the price, but I have done alot of bussiness with him and he has never steered me wrong. I gotta say these things are heavy duty, the flange on them looks to be 3 times thicker then some of the el-cheapo brands I have seen, nice beefy weld joints. They will turn colors on you, I prolly woulda went for the ceramic coating if I had it to do over again, other then that I am very pleased. Along with my magnaflow exhaust, the whole setup sounds very healthy without being deafening at freeway speeds

Livrat · 04-08-2005, 04:59 PM

I have had Doug Thorley (hard chrome) Tri-Y headers on the big block in my 68 GMC 4X4 for 20 years and they fit great, I have never had any problems with them at all.. I will admit since they are nickle chromed they do turn blue in about the first 5 minutes..

LUV2XCLR8 · 04-08-2005, 07:23 PM

I HAVE THE HEDMAN "ELITE" HEADERS I LUV THEM

http://67-72chevytrucks.com/vboard/s....php3?t=142497

chevyboy55 · 04-08-2005, 10:57 PM

I had Doug Thorleys for 20+ yrs & loved them,never had a lick of problem

70rs/ss · 04-09-2005, 12:17 AM

The only thing I can say bad about them is they work good on low end torqe, but kill the top end. I had a pair on a 500hp truck for awhile and it sort of fell on its face up high. I put on a set of hooker super comps and picked up 3/10th in the quarter! If I was building a daily driver or tow 4X4 rig I buy them again, but hooker and hedman make good headers too. You gotta compare apples to apples, ie do not put the $79 hookers up against the $400 tri Y's get the $300 hookers and you will be just as happy!! My 2 cents

04-08-2005, 11:18 AM	#1
Monsterrat Registered User Join Date: Apr 2005 Location: Now-Diamond Bar Soon-Corona Posts: 2	Doug Thorely Headers Anybody have anything to say about Thorely's headers? I hate my hookers' and I have a friend that LOVES his Thorely's. They looks *****en and seem to be quality(IE cleanest welds and great flanges/gaskets). I've never heard anything bad about them and wonder if there is a reason I never hear anything. Thanks Guys!

04-08-2005, 11:29 AM	#2
CHEVYE my gas saver Join Date: Sep 2003 Location: Clarksville, TN Posts: 2,046	i don't have them but my neighbor has a set on his 67 camaro. they are pricey but he says he'll never run anything else. what kind of issues are you having out of the hookers? i've never had a problem out of em. __________________ 85' SWB, 4.3/TH350, getting ready for paint 84`SWB, 462ci./TH400, cowl hood, 15" billet spec., flows, blazer buckets/console, flat black 71`SWB, project ebay feedback

04-08-2005, 11:37 AM	#3
junkyardjohn Registered User Join Date: Aug 2001 Location: SOMERSET KY. Posts: 6,427	I PUT A SET OF DOUG THORLY TRI-Ys ON A 71 WITH A S/B, & THEY WERE GREAT HEADERS. THE FIT & FINISH WAS GREAT. THEY WERE A LITTLE SPENDY THOUGH, BUT FROM THAT POINT ON.. ALL I WILL EVER USE IS THORLYs OR HOOKER SUPER COMP. THE CHEAPER HEADERS ARE A LESSON IN FUTILITY, & I WON'T USE THEM, EVEN IF SOMEONE GIVES THEM TO ME FOR FREE. JOHN __________________ junkyardjohn 69 1 TON TOW TRUCK // 84 4WD CUCV BLAZER// 85 1 TON 4WD STAKE TRUCK// 86 M1031 5/4 TON 4WD CUCV// ALOT OF OLD TRUCKS FOR ONE OLD MAN TO DRIVE. THERES ROOM FOR ALL OF GODS CREATURES RIGHT NEXT TO MY MASHED POTATOES// LIFE MEMBER OF P.E.T.A (PEOPLE EATING TASTY ANIMALS) DON'T RENT U-HAUL ALWAYS TELL THE TRUTH IT WILL AMAZE PART OF THE PEOPLE & ASTONISH THE REST

04-08-2005, 12:30 PM	#4
71Longbed Not Mine But A beauty Join Date: Aug 2004 Location: Southern CaL Posts: 368	that dougs are great a nice and thick flange and look great too __________________ 68 Chevy Shortbed 454/400 2000 Chevrolet Camaro SS 6spd 2011 Silverado 5.3 6spd auto

04-08-2005, 01:27 PM	#5
GMan69 Registered User Join Date: Mar 2001 Location: Hernando, MS USA Posts: 1,152	Overall, I've been pleased with the tri-Y's. Thicker mounting flanges and heavy-guage tubing makes for better durability. They've been on my daily driver for 2 1/2 years. No exhaust leaks and no rust- through. If I had it to do over, I would have gotten ceramic coating rather than chrome. The chrome blued about 2 minutes into my initial startup. If appearance matters, go with ceramic. Additionally, the passenger-side header is a little close to the starter. I wrapped my starter (mini starter actually) with foil-backed fiberglass insulation as a heat barrier. On the driver's side, one of the tubes is kind of close to the lower A-arm shaft (where the grease fitting is). Not problematic, just close. All this considered, I selected them mainly for durability for a truck that is driven regularly and I'm glad I did. __________________ George Morgan Hernando, MS '69 C-10 swb fleetside '72 GMC swb Stepside

04-08-2005, 04:29 PM	#6
jetfixr Registered User Join Date: Jan 2005 Location: Central CA Posts: 86	The guy at the speed shop said he wouldn't go with anything else but Doug Thorleys on my truck. He said they fit the best and you never have to mess with them. Of course, I had a bit of heartburn when he told me the price, but I have done alot of bussiness with him and he has never steered me wrong. I gotta say these things are heavy duty, the flange on them looks to be 3 times thicker then some of the el-cheapo brands I have seen, nice beefy weld joints. They will turn colors on you, I prolly woulda went for the ceramic coating if I had it to do over again, other then that I am very pleased. Along with my magnaflow exhaust, the whole setup sounds very healthy without being deafening at freeway speeds

04-08-2005, 04:59 PM	#7
Livrat Member #1049 Join Date: Jun 2000 Location: Troy Montana Posts: 3,940	I have had Doug Thorley (hard chrome) Tri-Y headers on the big block in my 68 GMC 4X4 for 20 years and they fit great, I have never had any problems with them at all.. I will admit since they are nickle chromed they do turn blue in about the first 5 minutes..

04-08-2005, 07:23 PM	#8
LUV2XCLR8 The LuvShack Garage Join Date: Jan 2004 Location: Maple Grove, TN (West Side) Posts: 30,484	I HAVE THE HEDMAN "ELITE" HEADERS I LUV THEM http://67-72chevytrucks.com/vboard/s....php3?t=142497 __________________ Owner/Op: "TN Classic Transport Carriers" The Toy: "Square Vette" 72 Hybrid Blazer Toy Barn: "LuvShack" 40 x 60 x 20 Shop Tow Piggy:"Maddy" 88 Silverado 3500 Hauler: "Feathers" 14 Aluma 8218T Last edited by LUV2XCLR8; 04-08-2005 at 07:24 PM.

04-08-2005, 10:57 PM	#9
chevyboy55 Senior Member Join Date: Aug 2004 Location: Kelso,Wa Posts: 3,637	I had Doug Thorleys for 20+ yrs & loved them,never had a lick of problem

04-09-2005, 12:17 AM	#10
70rs/ss Registered User Join Date: Dec 2004 Location: Northern AZ Posts: 7,271	The only thing I can say bad about them is they work good on low end torqe, but kill the top end. I had a pair on a 500hp truck for awhile and it sort of fell on its face up high. I put on a set of hooker super comps and picked up 3/10th in the quarter! If I was building a daily driver or tow 4X4 rig I buy them again, but hooker and hedman make good headers too. You gotta compare apples to apples, ie do not put the $79 hookers up against the $400 tri Y's get the $300 hookers and you will be just as happy!! My 2 cents



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