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CMI Industrial is proud of its heritage as a designer and manufacturer of top-quality sound and noise attenuation systems that have set the benchmark for quality and innovation. CMI has enjoyed a decades-long leadership position by offering unparalleled products and services, and maintaining industry-leading customer satisfaction.

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CMI Sport Tube™ Systems

CMI Sport Tube Systems
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for 9.8" deck height block &
standard GM head castings

CMI Sport Tubes are a superior long tube header designed for both racing or virtually any high-performance application. For big- and small-block applications where maximum scavenging and horsepower are required, CMI Sport Tube headers deliver peak performance and power from naturally aspirated engines that generate more than one horsepower per cubic inch of displacement.

The all polished Sport Tube system is offered with a range of exhaust tailpipe options, as well as CMI's Sound Choice™ selectable silencing system. Each system includes all header attaching bolts, gaskets and cooling fittings required for installation. Tailpipes with a 4.5-inch outside diameter are required and sold separately.




Best pricing and availability through one of our
CMI Distributors or CMI Authorized here for details.

Part Part Number
Big Block Chevrolet
Custom straight-back style & taller versions.
Big Block Chevrolet
(Down-turned for Bravo Drive)
Small Block Chevrolet 13660
Ford 460 (Iron Head) 13650

Split Top Components

Header Upgrade Garage

  • Brackets
  • Sensor Couplings
  • Header Bolts