fastazzls1

Hi guys wondering if have the correct head bolts sent to me i have arp head bolts my question is are there susposed to be three diff legnths or just 2 thanks i have just 2 different legnths my block is pre 04

the m11 bolts are all the same
the m8 bolts are all the same thanks

49Willys

iTrader: (1)

There are a lot of post about this but arp 134-3609 is the set for pre 04, 2 different length of M11 and all M8 the same

Know It All

Pre 04 blocks have three different lengths; '04 up have two different lengths. You still want to check though if you think your block is an 04 block.

fastazzls1

Thanks its a 2000 ls1 so i need 134-3609 just recieved wrong bolts returning and getting right bolts sent this week to finish my install and hopefully get some dyno time

lsxdick

iTrader: (4)

I did the same thing when a got mine...whoops.

bigdan1

oupsss

2004 LQ4 block with 2001 LS1 "241" heads ....wich head bolts ?

3610 ( 2 sizes ) or 3609 ( 3 sizes ) ? ???

thanks ,
Dan

BlackDuk98

iTrader: (34)

heads don't matter, it's the block. like stated above, a 2004 block should be the 2 sizes. With that said, I have heard of some very early 2004 blocks still being a 3 bolt version. Easy way to check is just get a screw driver and stick it down the bolt holes and see if it goes in the same depth in all of them. Very easy to check.

COSPEED2

iTrader: (7)

You can also see the threads being equal on all the bolt holes compared to the outter ones being recessed.

bigdan1

thanks a lot !!!!

dan