I went out and bought 2 5/8-11 1" bolts and they werent even close. They were way too big. I could barly fit the tip of my pinky in the hole and the bolts were too big.
The car sound really bad and the exhaust pours out the back of the heads...what size is needed to plug it up?
you can use the bolts you took out of it. all i did was cut that tube off about 1 inch before the hole, then squished the round tube real good, than welded the crack just to make sure it dident leak.
+1 on wrong hole idea. there is a smaller threaded hole that does not pass through the heads, and is used to mount the tubing only. beside this is a larger hole, that may not seem threaded at first due to buildup, but it is. i'm pretty sure 5/8-11tpi bolts are what i used on mine also.
I know I'm not crazy and trust me I always know which hole is right....
I had the car started just to make sure and put my hand behind the head.....I could feel the exhaust pouring out, then had my gf kill the car. Then I tried to put the bolt in.....no go. The only thing that I can think of is that there is a lot of build up.....I'll try to clean it up and retry tomorrow morn....