Speedmaster 1-147-005 Vortec Low-Rise Intake Manifold Polished Aluminum SBC 350

The Speedmaster 1-147-005 is a polished aluminum low-rise intake manifold engineered specifically for Chevrolet small block engines equipped with 1996-and-later Vortec (Gen I+) cylinder heads or compatible Edelbrock E-Tec aluminum heads. This manifold delivers excellent street performance while maintaining the lowest profile in the Speedmaster lineup, making it ideal for engine swaps, street rods, and industrial applications with hood clearance constraints.

Key Features:

• Designed for 1996+ Vortec heads and Edelbrock E-Tec heads on any Chevy V-8 platform
• Dual carburetor compatibility: spread bore primary design with included square bore adapter plate and gasket
• Four-corner water outlet design with external water bypass provision for optimal cooling
• Dual distributor hold-down provisions for flexible installation options
• Compatible with late-model water necks, alternators, HEI distributors, and air conditioning brackets
• Polished aluminum finish for show-quality appearance
• Street legal for pollution-controlled vehicles when used with approved carburetors

Installation Notes:

• Direct bolt-on for aftermarket Vortec-style heads
• Fits 1996-and-later factory Vortec engines with minor modification: requires running a short heater hose section from the tapped hole at the front of the manifold to the 5/8-inch hose nipple on the passenger side of the water pump
• No modifications required to the manifold itself

This low-rise design provides an excellent balance of performance and practicality for street-driven small block Chevrolet builds, delivering improved airflow over stock manifolds while maintaining emissions compliance and vehicle compatibility.