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I picked up some bolts at Autozone. They use a Allen wrench and have safety wires to keep them from backing out once you have them installed. The set comes with a socket Allen wrench to install them.
I use the ARP SS hex bolts on my headers, the part number is 400-1109 with a 1" length. I like them because the heads are 5/16" instead of 3/8" so you can get in and tighten them easier and with a hex head you can use a socket, open or closed end wrench.
i don't have sw's but with my shorties i was able to use an allen head bolt that i got a 1/4 longer and put a lock washer on and they never backed out.. this idea didn't work with my EM lt's cause the primaries were too big.
Just seem tomake more sense to me. A nut seems easier to start than a bolt in those tight spaces.
JFYI I had to wobble out the end guide pin holes on my SW headers. After they went on the guide pins some of the bolt holes didn't line up very well. I don't know if it was because of the studs or not. I have never read of anyone else having this isssue.
I bought S/S allen socket head bolts that were 1" in length. These made it easier to use a torque wrench with and look cool. The only place I didn't use these at was where the A/C alt brace bolted to the header with a standoff type bolt.
I bought S/S allen socket head bolts that were 1" in length. These made it easier to use a torque wrench with and look cool. The only place I didn't use these at was where the A/C alt brace bolted to the header with a standoff type bolt.
What he said.However I think I'll try the stud thinges on my next build.
I know this thread is 14 years old. But I don't see how ARP 400-1209 bolts can be used in an LT1 C4. Pictured here is an OEM LT1 header bolt (I just removed from my '95 C4) next to ARP bolts 400-1209 bolts. The ARP bolts aren't even half the length of the OEM bolt. What am I missing?
ARP 400-1209 Header Bolts vs OEM LT1 C4 corvette header bolt.
I know this thread is 14 years old. But I don't see how ARP 400-1209 bolts can be used in an LT1 C4. Pictured here is an OEM LT1 header bolt (I just removed from my '95 C4) next to ARP bolts 400-1209 bolts. The ARP bolts aren't even half the length of the OEM bolt. What am I missing?
ARP 400-1209 Header Bolts vs OEM LT1 C4 corvette header bolt.
This is an old thread, but the stock exhaust headers had a much deeper flange than aftermarket ones like ARH, etc. The bolts that come with my new headers were 1” long and the flange measured 0.39” thick. Hope that helps.
