Beyea Custom Headers IDM-604-S1-D2 SBC Dirt Modified Header 604 Crate 1-5/8 to 1-3/4 Stepped

The Beyea Custom Headers IDM-604-S1-D2 is a high-performance stepped exhaust header designed specifically for IMCA and UMP Dirt Modified race cars running the GM 604 Crate engine. Engineered for maximum exhaust flow and power, this header features a 4-into-1 collector design with precision-stepped primary tubes that transition from 1-5/8 inch to 1-3/4 inch diameter.

Key Features:

• Stepped primary tubes: 1-5/8 inch to 1-3/4 inch for optimized exhaust scavenging
• 2-3/4 inch collector diameter for efficient exhaust flow
• Durable steel construction with black paint finish
• 5/16 inch thick flanges for secure mounting and leak prevention
• 4-into-1 collector configuration for maximum performance
• Designed and tested by Beyea Custom Headers racing experts

This header set is compatible with multiple dirt modified chassis including Arrow, Bullet, Edge, Hamilton, Harris, Jet, LG2, Rage, Razor, SB, Skyrocket, and Sidebiter. Sold as a pair. Gaskets and hardware sold separately. This part is designed for racing and competition vehicles only.