What size are small block Chevy header bolts?

ARP Fasteners 400-1201 Exhaust Header Bolt For Use With Chevy Small Block; 3/8 – 16 Inch Thread Size; .

What size are Chevy header bolts?

Header Bolts, 3/8-16 x 1 Inch, Set/12.

What size are small block Chevy exhaust manifold bolts?

Most are 2 1/2″ long but there are manifolds that use shorter bolts as well.

What size are manifold bolts?

If a 1/2 inch or 13mm wrench fits it, then it’s either 5/16-18 if it’s SAE, or m8x1. 25 if it’s metric. If a 9/16 wrench fits it, it’s probably 3/8-16 SAE. If a 17mm wrench fits the nut, it’s probably m10x1.

What size are LS header bolts?

Chevy LS V8, 1.181″ Under Head Length, 8mm x 1.25 Thread Pitch, Hex Wrench Type, Steel.

What size are 350 Chevy header bolts?

1004 Fits Chevy SBC 350 6 Point Stainless Steel Exhaust Header Bolt Kit (12mm x 29mm)

What are the torque specs for a 350 Chevy flywheel?

Small Block Chevy Torque Specs

Fastener Type Torque Spec
Harmonic Damper Bolt 60 ft.-lbs.
Flywheel/Flexplate Bolts 65 ft.-lbs.
Pressure Plate Bolts 35 ft.-lbs.
Bellhousing Bolts 25 ft.-lbs.

What is exhaust manifold?

Bolted directly to the engine block, the exhaust manifold is the first section of a vehicle’s exhaust system. It funnels exhaust gases from all the cylinders and routes them to the car’s catalytic converter.

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What size are ls1 exhaust manifold bolts?

Exhaust Header Bolts Suit Chev LS1 LS2 LS3, Late Ford Models. M8 x 1.25 Metric

Exhaust Header Bolts 10mm Head Size
Part No. BOL2-25
Dimensions 25mm long [1.00″]
Thread M8 x 1.25 Metric
Quantity min quantity 12

Why do LS exhaust manifold bolts break?

Each duty cycle will provide tension stress on the studs or bolts that hold the manifold in place. … This expansion and stretching of the manifold bolts over numerous duty cycles eventually causes too much tension on the bolt(s), stretching them beyond capacity and causing them to fail.

What size are hemi manifold bolts?

It includes (17 ea) 8 millimeter-1.25 X 25 millimeter 6 point bolts with double hex head (includes 3/16 inch recessed allen head) and matching locking retainers and clips.