Honda K20A/A2 NA Rebuild Kit with Spool X300 Extreme 300m Conrods and CP Forged Pistons

Honda K20A / K20A2 Naturally Aspirated Forged Rebuild Kit

Designed for high-performance naturally aspirated Honda K-Series builds, the Spool Honda K20A / K20A2 Forged Rebuild Kit combines premium components from CP-Carrillo, Spool, ACL and Cometic to provide the strength, reliability and performance required for demanding street, circuit, drag racing and motorsport applications.

Whether you're building a responsive street engine, a high-RPM circuit engine or an all-out naturally aspirated race combination, this package includes the essential components needed to create a strong and reliable bottom end capable of handling serious power and RPM.

Kit Includes

• CP-Carrillo Forged Pistons

• Spool X300 Extreme 300M I-Beam Conrods

• ACL Race Series Main Bearings

• ACL Race Series Big End Bearings

• Cometic MLS Multi-Layer Steel Head Gasket

Available Piston Options

Forging Style: X-style forging, which provides additional strength and durability while keeping the overall mass down.

CP-Carrillo Forged Pistons

CP-Carrillo pistons are trusted worldwide in high-performance and motorsport applications. Manufactured from premium forged aluminium, they provide exceptional strength, durability and consistency for high-RPM naturally aspirated engine combinations.

Features include:

• High-strength forged aluminium construction

• Performance ring package included

• Deep valve reliefs suitable for performance camshafts

• Precision CNC machined and weight matched

• Designed for high-performance naturally aspirated applications

HD Packages include upgraded heavy-duty ring packs and premium 9310 steel wrist pins with a .250" wall thickness.

Optional wrist pin upgrades are available for all non-HD piston packages.

Spool X300 Extreme 300M Conrods

The Spool X300 Extreme series has been engineered for extreme horsepower and high-RPM applications. Manufactured from premium aerospace-grade 300M alloy steel, these rods provide exceptional tensile strength, fatigue resistance and durability compared to conventional 4340 connecting rods.

Features include:

• Premium 300M forged steel construction

• Two-piece precision forging design

• Dowelled caps for precise alignment

• Vacuum degassed material for maximum purity

• Quenched and heat treated

• Shot peened for improved fatigue resistance

• X-ray and sonic tested

• 100% Magnaflux inspected

• Weight matched sets to within ±1 gram

Conrod Bolt Options

Spool X300 conrods are supplied standard with genuine ARP 2000 fasteners and can be upgraded to suit more demanding applications:

• ARP 2000 (Standard)

• ARP L19 Upgrade

• ARP CA625+ Upgrade

ACL Race Series Bearings

ACL Race Series bearings are the preferred choice of engine builders worldwide, providing outstanding load capacity, durability and oil control for high-performance and high-RPM applications.

Cometic MLS Head Gasket

Included in every kit is a genuine Cometic MLS (Multi-Layer Steel) head gasket, providing exceptional sealing performance and reliability in demanding naturally aspirated applications.

Built for High RPM Performance

From weekend track cars to championship-winning race engines, this package combines proven components from some of the most respected names in the industry to provide a strong foundation for your Honda K20A or K20A2 engine build.

Whether you're chasing maximum power from a naturally aspirated combination or building a reliable high-RPM performance engine, this kit delivers the quality components required to achieve your goals.