Stock Header Bolt Lenght?
Thread Starter
Burning Brakes
Joined: Feb 2003
Posts: 1,212
Likes: 0
From: OH
Stock Header Bolt Lenght?
I currently have Hooker shorties, and am looking at switching to some TPIS longtubes since I would be getting a good deal on a used set.
Only thing is the TPIS use stock bolts, which I no longer have. Anybody happen to know what lenght bolts will work?
Its been a while since I've had stock, but I don't think a 1" bolt will provide enought grip in the head with a 3/8" flange, plus the bolt flanges on those headers.
Need to find out what lenght I do need. I also want to make sure I get a set with Allen keys internal so I can actually tighten down #8 without driving myself nuts (went thru that already installing TPIS longtubes on my 85).
Thanks
Only thing is the TPIS use stock bolts, which I no longer have. Anybody happen to know what lenght bolts will work?
Its been a while since I've had stock, but I don't think a 1" bolt will provide enought grip in the head with a 3/8" flange, plus the bolt flanges on those headers.
Need to find out what lenght I do need. I also want to make sure I get a set with Allen keys internal so I can actually tighten down #8 without driving myself nuts (went thru that already installing TPIS longtubes on my 85).
Thanks
Race Director
Joined: Feb 2003
Posts: 11,671
Likes: 20
From: Lake Wylie SC
Why can't you use the bolts used on the Hookers? The bolts that came with the Hookers were, in my opion, too short and they were 3/4". I used 1" allen socket head bolts. Is the TPIS header flange thicker than the Hooker flange? I measured the depth of the header bolt hole and ran a thread chaser them to make sure the 1" bolts didn't bottom out. I suggest you do the same. I, too, will be upgrading from Hooker Shorties to EM's LTs.
Thread Starter
Burning Brakes
Joined: Feb 2003
Posts: 1,212
Likes: 0
From: OH
TPIS has those stock bolt standoffs welded on the flange, so that is another 3/8 - 1/2" of gap away from the threads on the head.
Also the bolts I have on the Hookers suck. Last owner installed them, but the bolts themselves are starting to corrode. So a new set would be in order for sure.
Also the bolts I have on the Hookers suck. Last owner installed them, but the bolts themselves are starting to corrode. So a new set would be in order for sure.
Melting Slicks
Joined: May 2002
Posts: 2,670
Likes: 4
From: Severna Park MD
Originally Posted by rsafier
I currently have Hooker shorties, and am looking at switching to some TPIS longtubes since I would be getting a good deal on a used set.
Only thing is the TPIS use stock bolts, which I no longer have. Anybody happen to know what lenght bolts will work?
Its been a while since I've had stock, but I don't think a 1" bolt will provide enought grip in the head with a 3/8" flange, plus the bolt flanges on those headers.
Need to find out what lenght I do need. I also want to make sure I get a set with Allen keys internal so I can actually tighten down #8 without driving myself nuts (went thru that already installing TPIS longtubes on my 85).
Thanks
Only thing is the TPIS use stock bolts, which I no longer have. Anybody happen to know what lenght bolts will work?
Its been a while since I've had stock, but I don't think a 1" bolt will provide enought grip in the head with a 3/8" flange, plus the bolt flanges on those headers.
Need to find out what lenght I do need. I also want to make sure I get a set with Allen keys internal so I can actually tighten down #8 without driving myself nuts (went thru that already installing TPIS longtubes on my 85).
Thanks
They do not come as a kit but can be bought in the individual quantity, 3 of the stud type and 9 of the cap end type. Amazingly, the price is less than you would pay in the hardware store. They must not be metric.
Call Chris at 800-728-8267. Say you are from the Corvetteforum. No Corvette tax on these, and still available from GM.
I use a crow's foot on my torque wrench to tighten them.
