Headbolts

[SoopaGhetto]

Sweet! i checked it out, pretty much have everything i need.

i was wondering, would these fit the M10, or only the M20?

Part Number: 91303A306
$10.56 per Pack of 5
ANSI Specification
ANSI B18.3.1M
ASTM Specification
ASTM A574M
ASME Specification
ASME B18.3.1M
Head Style
Standard
Material Type
Steel
Finish
Blue-Coated
Class
Class 12.9
Drive Style
Hex Socket
System of Measurement
Metric
Thread Size
M10
Metric Thread Pitch
1.5 mm
Length
150 mm
Hex Key Size
8 mm
Thread Style
Right Handed
Thread Length
Partially Threaded
Head Diameter
16 mm
Head Height
10 mm
Rockwell Hardness
C38-C44
Minimum Tensile Strength
176,900 psi
Thread Fit
Class 4g6g
Specifications Met
American National Standards Institute (ANSI) and American Society of Mechanical Engineers (ASME) and American Society for Testing and Materials (ASTM)


They are a 12.9 class bolt. Alot of the turbo guys on e30tech use them and have had no issuse with them. Plus they are reuseable unlike the stock bolts.

[browntown]

seems to be lots of chatter about metric blues on e30tech, seems to be well reviewed.

[mops]

seems to be lots of chatter about metric blues on e30tech, seems to be well reviewed.

sorry to revive old thread, but I am deciding what headbolt to use for my turbo stroker rebuild.

yes, there's a lot of talk about metric blues, but not all is positive. actually people have some mixed responses.

ok, so... what are the choices ?
1. metric blues (rather not)
2. stock oem headbolts (definitely not)
3. arp headstuds (great, but over US$200)
4. raceware headstuds (great, but over US$200)

are there any other options ?

I think i would cut corners and save money by going with stock headgasket and good headstuds torques heaps ;)

[digger]

sorry to revive old thread, but I am deciding what headbolt to use for my turbo stroker rebuild.

yes, there's a lot of talk about metric blues, but not all is positive. actually people have some mixed responses.

ok, so... what are the choices ?
1. metric blues (rather not)
2. stock oem headbolts (definitely not)
3. arp headstuds (great, but over US$200)
4. raceware headstuds (great, but over US$200)

are there any other options ?

I think i would cut corners and save money by going with stock headgasket and good headstuds torques heaps ;)

go with ARP the cost of a failure could be huge