Spool AU 4 Litre Ford Conrods and Ross Racing Forged Pistons

Spool AU 4.0 Litre Ford Conrods and Custom Ross Racing Pistons

This combination uses the BA Rod with a Custom Piston

These are a custom piston made for us and rated at 1000hp by Ross Racing Pistons. The pistons come standard with a 0.200" (5mm) Tool Steel 52100 Gudgeon Pin.

Pistons are available in:

• Compression Ratios: 9.0:1
• Bore Sizes:  +1mm
• Pistons come with rings, gudgeon pins and pin locks
• Forged 2618

Ross Racing Pistons:

All of Ross Racing Pistons (since 1985) have been forged from 2618 billet bar stock and have been heat treated and aged to a T61 condition (2618-T61). 2618-T61 is the material that is used when fatigue resistance and durability are of prime importance by all premium racing piston manufacturers.

Spool Connecting Rods Feature:

• ARP 2000 fasteners (L19 fasteners are available as an upgrade)
• High tensile 4340 forged steel
• 2 Piece forging
• Hardness of HRC36-42
• Dowelled caps for precision alignment
• X-RAY & Sonic tested
• Quenching and heat treated
• Shot peened
• 100% Magnafluxed
• Weight Matched Sets +/- 1 gram
• Vacuum degassed to remove impurities