1) Compatible With 1955 And Up Small Block Chevy Engines Including 265, 283, 305, 327, 350, 383, And 400 V8 Engines.

Do Not Fit The Models Listed Below:

1971 Chevrolet Nova

1972 Chevrolet Caprice

1983 Chevrolet Caprice Classic Sedan 4-Door 5.0L

1984 Buick Regal

1986 Chevrolet Caprice 5.7L

1987 Chevrolet Caprice

1978 Chevrolet Corvette

1973 Chevrolet Nova Base 5.7L 350

2) They Are Expertly Crafted To Enhance Performance In 5.0L (305ci), 5.3L (327ci), 5.7L (350ci), And 6.6L (400ci) Engines

3) Engineered For A Perfect Fit With Straight Plug Cylinder Heads, These Headers Employ A Hugger Design To Mitigate Clearance Issues.

4) These Shorty Exhaust Headers Are Constructed Of High-Strength Steel And Feature A Nice Black-Coated Finish.

5) Each Flange Is Precision TIG Welded Using CNC Machinery For Unmatched Strength And Durability.

6) The Headers Offer A Direct Bolt-On Design With A Three-Bolt Mounting Style For A Hassle-Free Setup.

7) Head Flange Thickness: 3/8"

8) Pipe Thickness: 16 Gauge

9) Inlet Diameter: 1 1/2"

10) Outlet Diameter: 2 1/2"

11) Package Includes: As Shown In Our Pictures.

This Item Doesn't Come With Installation Guides. We Highly Recommend Professional Installation.