Speedmaster 1-148-015 Ford Small Block Downdraft EFI Stack Intake Manifold System - 260 289 302W

The Speedmaster 1-148-015 is a complete downdraft EFI stack intake manifold system designed for Ford small block 260, 289, and 302W engines. This system combines the classic appearance of Weber-style individual throttle bodies with the performance advantages and tuning versatility of modern electronic fuel injection.

Key Features:

• Precision cast aluminum 50mm IDA-style throttle bodies deliver crisp throttle response and superior idle characteristics
• CNC machined, heat-treated 6061 cast aluminum construction for durability and precision
• Butterflies are individually measured and precision machined to tight tolerances for each bore
• Centerless ground brass throttle shafts with split screws ensure reliability and serviceability
• O-ring seals on lower mounting faces prevent vacuum leaks
• Integrated linkage system with throttle stops, idle controls, lever arms, and joiner/balancer
• Single screw adjustment for easy calibration of front-to-rear throttle shafts
• Fully indexable eccentric cable pulley on bell crank for optimal throttle geometry and drivability

This complete system provides tight air/fuel ratio control for improved emissions and fuel economy while supporting high horsepower applications. The downdraft design delivers the performance benefits of individual runner EFI with exceptional throttle response throughout the RPM range. Compatible with aftermarket EFI sensor kits for complete engine management integration.