Generation III External Engine LS1 | LS6 | Bolt-Ons | Intakes | Exhaust | Ignition | Accessories
Sponsored by:
Sponsored by:

header bolt size dimensions

Thread Tools
 
Search this Thread
 
Old 10-01-2008, 08:27 AM
  #1  
TECH Regular
Thread Starter
iTrader: (10)
 
chetmo's Avatar
 
Join Date: Oct 2005
Posts: 403
Likes: 0
Received 0 Likes on 0 Posts
Default header bolt size dimensions

OK, i know the regular 3/8 or whatever the standard size header bolt wouldnt fit, I couldnt find any at the local auto parts store that was smaller. Whats the exact spec on the header bolts, and where could I find them locally?
Old 10-01-2008, 08:42 AM
  #2  
11 Second Club
iTrader: (1)
 
69LT1Bird's Avatar
 
Join Date: Sep 2007
Location: Lapeer, MI
Posts: 2,310
Likes: 0
Received 4 Likes on 4 Posts
Default

This is the bolt for the LS2 stock exhaust manifold

BOLT, HFH, M8X1.25X30, 20.9 THD, 18 O.D., 10.9
Old 10-01-2008, 09:52 AM
  #3  
TECH Regular
Thread Starter
iTrader: (10)
 
chetmo's Avatar
 
Join Date: Oct 2005
Posts: 403
Likes: 0
Received 0 Likes on 0 Posts
Default

Ok i might just go pick up a bolt from lowes and a locking washer, or is this a bad idea?
Old 10-01-2008, 10:19 AM
  #4  
11 Second Club
iTrader: (1)
 
69LT1Bird's Avatar
 
Join Date: Sep 2007
Location: Lapeer, MI
Posts: 2,310
Likes: 0
Received 4 Likes on 4 Posts
Default

The head ok the bolts from the hardware store will probably be too big for the clearance near rhe tubes. I studded mine and they work good.
Old 10-01-2008, 10:24 AM
  #5  
Teching In
iTrader: (1)
 
dltaskull's Avatar
 
Join Date: Nov 2006
Location: Hattiesburg, MS
Posts: 48
Likes: 0
Received 0 Likes on 0 Posts

Default

I got stainless at Ace hardware make sure it is the metric 8mm , they work great. no more rust.
Old 10-01-2008, 10:36 AM
  #6  
TECH Regular
Thread Starter
iTrader: (10)
 
chetmo's Avatar
 
Join Date: Oct 2005
Posts: 403
Likes: 0
Received 0 Likes on 0 Posts
Default

thanks guys, I will go hunt for some today!



Quick Reply: header bolt size dimensions



All times are GMT -5. The time now is 03:00 AM.