Holley EFI HP Smart Coil Sub Harnesses – Pre-terminated harnesses for connecting Holley HP Smart Coils to the ECU, designed for 8-cylinder engines.

Holley EFI Comp Mid-Mount Accessory System, LS, Black – Compact and clean LS engine accessory drive system with LT1-style water pump, A/C compressor, power steering pump, and alternator.

Holley EFI Comp Hi-Pass Bracket Kit, LS/LT, with SD5, Natural Finish – High-mount accessory drive kit for LS/LT engines with SD508 compressor, tensioner, and idler pulleys.

The Heat Reflective Adhesive Tape 2" x 10m provides high-temperature insulation to protect engine components from heat damage, commonly used in automotive applications.

2.5" 10mm thick stainless steel header flange with a 2-bolt pattern for durable exhaust system connections.

​Hard Blok Engine Block Filler 860228 (Tall Fill, 28 lbs) is a cement-based filler designed to reinforce engine blocks, commonly used in drag racing and high-performance applications.

The Hard Blok Engine Block Filler 860212 (Short Fill, 12 lbs) is a high-performance, cement-based filler designed to reinforce engine blocks, commonly used in drag racing and high-performance applications.

The HF Throttle Body Spacer 90mm improves airflow and throttle response by creating space between the intake manifold and throttle body, compatible with LS-style 4-bolt throttle bodies.

The HF Throttle Body Spacer 102mm improves airflow and throttle response by creating space between the intake manifold and throttle body, compatible with LS-style 4-bolt throttle bodies.

The HF Throttle Body for Nissan Y61 (80mm) is a high-performance upgrade designed to improve airflow and throttle response for the Nissan Y61 Patrol.

The HF Throttle Body 90mm in Silver is a high-performance throttle body designed to improve airflow and throttle response for enhanced engine performance.

The HF Throttle Body 90mm in Red is a high-performance throttle body designed to improve airflow and throttle response for enhanced engine performance.

HF Throttle Body 90mm Black Double Knob – High-performance 90mm throttle body with dual knobs and a black anodized finish for improved airflow and control.

The HF Throttle Body 90mm Black is a billet aluminum upgrade with a black anodized finish, designed to improve airflow and throttle response for LS engines.

HF Throttle Body 127mm Silver – High-performance throttle body with a 127mm diameter, anodized silver finish, and aluminum construction for enhanced airflow and throttle response.