Performance Parts

The Speedmaster Chevy GM LS1 Downdraft EFI Stack Intake Manifold System is a complete, ready-to-install intake solution engineered for LS1-based powerplants. This downdraft-design EFI stack manifold...

The Speedmaster Chevy GM LS1 Downdraft EFI Stack Intake Manifold System is a complete, bolt-on fuel delivery solution engineered for LS1-powered vehicles. This polished aluminum manifold uses a...

The Speedmaster Chevy GM LS1 LS2 Dual Plane Fuel Injected Intake Manifold (1-148-053-02) is a precision-engineered induction component designed specifically for GM LS-series engines. This polished...

The Speedmaster aluminum valve covers are precision-engineered replacements designed for Chevy/GM LS-series engines, including LS1, LS2, LS3, LS6, and LS7 variants. Constructed from durable aluminum,...

The Speedmaster PCE148.1103 is a fabricated 102mm EFI ram air intake manifold engineered for Chevy and GM LS-series engines (LS1, LS2, LS6). Finished in black, this intake manifold is designed to...

The Speedmaster LS1/LS6 1.7 ratio aluminum pedestal rocker arms set is a precision engine component designed for Chevy and GM performance applications. This rocker arm assembly features a 1.7 ratio...

The Speedmaster PCE261.1130 is a complete aluminum shaft rocker arms set engineered for Chevy and GM LS1 and LS6 engines, featuring a 1.7 valve lift ratio to optimize camshaft performance and engine...

The Speedmaster PCE261.1118 is a roller rocker arm set engineered for Chevy and GM LS1 and LS6 engines. Constructed from stainless steel with a 1.8 ratio design, this adjustable rocker arm set...

The Speedmaster Chevy GM LS1 LS6 12V High Output E-Poxy Ignition Coil is a precision replacement component engineered for GM's legendary LS-series engines. With robust epoxy construction and a red...

This Speedmaster ignition coil pack is engineered for Chevy and GM LS1 and LS6 engine applications. Each of the eight high-output 12V coils features an e-poxy construction and the iconic red square...

The Speedmaster Chevy GM LS1 LS6 12V High Output Ignition Coil (PCE382.1032.01) is a direct replacement ignition component engineered for LS-series engines. Featuring a square D585 design with...

The Speedmaster Chevy GM LS1 Shaft Mount Roller Rocker Arms (1-261-034) are precision-engineered valvetrain components designed to replace factory rocker arms on LS1 engines. These stainless steel...

The Speedmaster Chevy GM LS3 Complete 6-71 Roots Supercharger Blower Kit PCE460.1011 is a comprehensive performance upgrade designed for LS3-equipped vehicles seeking increased horsepower and torque...

The Speedmaster Chevy GM LS3 Downdraft EFI Stack Intake Manifold System (MPN 1-148-002) is a complete, ready-to-install intake manifold designed for LS3 engine applications. This polished downdraft...

The Speedmaster PCE667.1001 is a precision-engineered aluminum intake adapter designed specifically for Chevy and GM LS3 engines. This downdraft-style idle air control (IAC) adapter bridges the...