Hedman Hedders 68250 Long Tube Header 1955-57 Chevy Big Block 396-502

The Hedman Hedders 68250 is a specialty engine swap header designed specifically for installing 396-502 cubic inch big block Chevy engines into 1955-1957 Chevrolet passenger cars. This long tube header design delivers excellent top-end horsepower and torque gains over restrictive factory cast iron manifolds.

Construction and Design:

• Handcrafted 18-gauge mild steel construction with mandrel-bent primary tubes
• 1-3/4 inch primary tube diameter for optimal exhaust flow
• 3 inch collector diameter with ball and socket gasketless design
• 2-1/2 inch reducer outlet size included
• Thick 1/4 inch flanges for long-lasting, leak-proof seal
• Down-swept tube direction for proper clearance

What's Included:

• Pair of headers
• Header-to-head gaskets
• New mounting bolts and hardware
• Collector reducers (exhaust adapters)
• Installation instructions

Important Notes: This header is shipped uncoated with temporary protective paint that is designed to burn off during use. High temperature paint or ceramic coating is recommended for final finish and long-term protection. Compatible with power steering, air conditioning, and floor-shift automatic or manual transmissions. Front engine mounts only. Not legal for street use on 1975 and later emission-controlled vehicles—off-road and competition use only.