All Exhaust Systems by Engine Model - Big Block Chevy 454 / 502, 7.4L / 8.2L Exhaust Systems

CMI Big Block Chevy Big E-Top Polished Exhaust System 1-7/8″ Primaries

These “Big E-top” offer a 1-7/8″ primary, straight back CMI Big E-top E-Top are a header designed for both racing or any high-performance application. These leaned, taller headers are commonly used in custom or staggered set up for your high horsepower builds. These headers feature the CMI Big Tube Flex Flare Tailpipe Connection. For big-block applications. CMI Big E-top headers deliver peak performance and power from Supercharged applications.

Note: All CMI Systems are sold without Tailpipes

CMI Big Block Chevy Big E-Top Polished Exhaust System 1-7/8″ Primaries for Turbo Applications

These “Big E-top” offer a 1-7/8″ primary, straight back CMI Big E-top E-Top are a header designed for both racing or any high-performance application. These leaned, taller headers are commonly used in custom or staggered set up for your high horsepower builds. These headers feature the CMI Big Tube Flex Flare Tailpipe Connection. For big-block applications. This CMI Big E-top headers has a beveled top for easy bolt up of your turbos.

Note: All CMI Systems are sold without Tailpipes

CMI Big Block Chevy Big E-Top Polished Exhaust System 2 1/4″ Primaries

These “Big E-top” offer a large 2 1/4″ primary, straight back CMI Big E-top E-Top are a header designed for both racing or any high-performance application. These leaned, taller headers are commonly used in custom or staggered set up for your high horsepower builds. These headers feature the CMI Big Tube Flex Flare Tailpipe Connection. For big-block applications. CMI Big E-top headers deliver peak performance and power from Supercharged applications.

Note: All CMI Systems are sold without Tailpipes

CMI Big Block Chevy Big E-Top Polished Exhaust System 2 1/4″ Primaries

These “Big E-top” offer a large 2 1/4″ primary, straight back CMI Big E-top E-Top are a header designed for both racing or any high-performance application. They feature a “D” Port flange to match the Brodix heads on Mercury 850-1200 SC motors. These leaned, taller headers are commonly used in custom or staggered set up for your high horsepower builds. These headers feature the CMI Big Tube Flex Flare Tailpipe Connection. For big-block applications. CMI Big E-top headers deliver peak performance and power from Supercharged applications.

Note: All CMI Systems are sold without Tailpipes

CMI Big Block Chevy Big E-Top Polished Exhaust System 2 1/4″ Primaries for Turbo Applications

These “Big E-top” offer a large 2 1/4″ primary, straight back CMI Big E-top E-Top are a header designed for both racing or any high-performance application. These leaned, taller headers are commonly used in custom or staggered set up for your high horsepower builds. These headers feature the CMI Big Tube Flex Flare Tailpipe Connection. For big-block applications. This CMI Big E-top headers has a beveled top for easy bolt up of your turbos.

Note: All CMI Systems are sold without Tailpipes

CMI Big Block Chevy Big E-Top Polished Exhaust System 2-1/4" x 2-1/8" Stepped Primaries

These “Big E-top” offer a large 2-1/4" x 2-1/8" Stepped primary, straight back CMI Big E-top E-Top are a header designed for both racing or any high-performance application. These leaned, taller headers are commonly used in custom or staggered set up for your high horsepower builds. These headers feature the CMI Big Tube Flex Flare Tailpipe Connection. For big-block applications. CMI Big E-top headers deliver peak performance and power from Supercharged applications.

Note: All CMI Systems are sold without Tailpipes

CMI Big Block Chevy Big E-Top Polished Exhaust System 2 1/8″ Primaries

These “Big E-top” offer a large 2 1/8″ primary, straight back CMI Big E-top E-Top are a header designed for both racing or any high-performance application. These leaned, taller headers are commonly used in custom or staggered set up for your high horsepower builds. These headers feature the CMI Big Tube Flex Flare Tailpipe Connection. For big-block applications. CMI Big E-top headers deliver peak performance and power from Supercharged applications.

Note: All CMI Systems are sold without Tailpipes

CMI Big Block Chevy Big Sport Tube Exhaust System, 2-1/4" Primaries, Polished

These “Big Tubes” offer a large 2.25″ primary, straight back superior long tube header designed for both racing or any high-performance application. These straight, taller headers are commonly used in custom high horsepower builds. These headers feature the CMI Big Tube Flex Flare Tailpipe Connection. For big-block applications, where maximum scavenging and horsepower are required, CMI Big Tubes headers deliver peak performance and power from naturally aspirated engines. The headers can be built to your custom measurements based on your motor.

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.

Note: All CMI Systems are sold without Tailpipes

CMI Big Block Chevy Big Sport Tube Exhaust System, 2-1/4" Primaries, 18"T x 26.25"W, Polished

These “Big Tubes” offer a large 2.25″ primary, straight back superior long tube header designed for both racing or any high-performance application. These straight back, taller headers are commonly used in custom high horsepower builds. These headers feature the CMI Big Tube Flex Flare Tailpipe Connection. For big-block applications, where maximum scavenging and horsepower are required, CMI Big Tube headers deliver peak performance and power from naturally aspirated engines. The headers are built with a collector width of 26.25” center to center and a collector height from the crankshaft of 18”.

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.

Note: All CMI Systems are sold without Tailpipes

CMI Big Block Chevy Big Sport Tube Exhaust System, 2-1/4" Primaries, 21.5"T x 28"W, Polished

These “Big Tubes” offer a large 2.25″ primary, straight back superior long tube header designed for both racing or any high-performance application. These straight back, taller headers are commonly used in custom high horsepower builds. These headers feature the CMI Big Tube Flex Flare Tailpipe Connection. For big-block applications, where maximum scavenging and horsepower are required, CMI Big Tube headers deliver peak performance and power from naturally aspirated engines. The headers are built with a collector width of 28” center to center and a collector height from the crankshaft of 21 ½”.

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.

Note: All CMI Systems are sold without Tailpipes

CMI Big Block Chevy Big Sport Tube Exhaust System, 2-1/4" Primaries, 24.5"T x 28"W, Polished

These “Big Tubes” offer a large 2.25″ primary, straight back superior long tube header designed for both racing or any high-performance application. These straight back, taller headers are commonly used in custom high horsepower builds. These headers feature the CMI Big Tube Flex Flare Tailpipe Connection. For big-block applications, where maximum scavenging and horsepower are required, CMI Big Tube headers deliver peak performance and power from naturally aspirated engines. The headers are built with a collector width of 28” center to center and a collector height from the crankshaft of 24 ½”.

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.

Note: All CMI Systems are sold without Tailpipes

CMI Big Block Chevy Big Sport Tube Exhaust System, 2-1/4" Primaries, 27.5"T x 25"W, Polished

These “Big Tubes” offer a large 2.25″ primary, straight back superior long tube header designed for both racing or any high-performance application. These straight back, taller headers are commonly used in custom high horsepower builds. These headers feature the CMI Big Tube Flex Flare Tailpipe Connection. For big-block applications, where maximum scavenging and horsepower are required, CMI Big Tube headers deliver peak performance and power from naturally aspirated engines. The headers are built with a collector width of 25” center to center and a collector height from the crankshaft of 27 ½”.

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.

Note: All CMI Systems are sold without Tailpipes

CMI Big Block Chevy Big Sport Tube Exhaust System, 2-1/4" Primaries, Polished, 5 Degree Downturn

These “Big Tubes” offer a large 2.25″ primary, straight back superior long tube header designed for both racing or any high-performance application. These straight, taller headers are commonly used in custom high horsepower builds. These headers feature the CMI Big Tube Flex Flare Tailpipe Connection. For big-block applications, where maximum scavenging and horsepower are required, CMI Big Tubes headers deliver peak performance and power from naturally aspirated engines. The headers can be built to your custom measurements based on your motor.

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.

Note: All CMI Systems are sold without Tailpipes

CMI Big Block Chevy Big Sport Tube Exhaust System, 2-1/8" Primaries, Polished

These “Big Tubes” offer a large 2 1/8″ primary, straight back superior long tube header designed for both racing or any high-performance application. These leaned, taller headers are commonly used in custom high horsepower builds. These headers feature the CMI Big Tube Flex Flare Tailpipe Connection. For big-block applications, where maximum scavenging and horsepower are required, CMI Big Tube headers deliver peak performance and power from naturally aspirated engines. This is a full polished header.

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.

Note: All CMI Systems are sold without Tailpipes

CMI Big Block Chevy Big Sport Tube Exhaust System, 2-1/8" Primaries, 850-1200 SC Flange, Polished

These “Big Tubes” offer a large 2 1/8″ primary, straight back superior long tube header designed for both racing or any high-performance application. They feature a “D” Port flange to match the Brodix heads on Mercury 850-1200 SC motors. These leaned, taller headers are commonly used in custom or staggered set up for your high horsepower builds. These headers feature the CMI Big Tube Flex Flare Tailpipe Connection. For big-block applications, where maximum scavenging and horsepower are required, CMI Big Tube headers deliver peak performance and power from naturally aspirated engines. This is a full polished header.

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.

Note: All CMI Systems are sold without Tailpipes

CMI Big Block Chevy Big Sport Tube Exhaust System, 2-1/8" Primaries, 18"T x 26.25"W, Polished

These “Big Tubes” offer a large 2.125″ primary, straight back superior long tube header designed for both racing or any high-performance application. These straight back, taller headers are commonly used in custom high horsepower builds. These headers feature the CMI Big Tube Flex Flare Tailpipe Connection. For big-block applications, where maximum scavenging and horsepower are required, CMI Big Tube headers deliver peak performance and power from naturally aspirated engines. The headers are built with a collector width of 26.25” center to center and a collector height from the crankshaft of 18”.

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.

Note: All CMI Systems are sold without Tailpipes

CMI Big Block Chevy Big Sport Tube Exhaust System, 2-1/8" x 2-1/4", Stepped Primaries, Polished

These “Big Tubes” offer a large 2-1/8" x 2-1/4" Stepped primary, straight back superior long tube header designed for both racing or any high-performance application. These straight, taller headers are commonly used in custom high horsepower builds. These headers feature the CMI Big Tube Flex Flare Tailpipe Connection. For big-block applications, where maximum scavenging and horsepower are required, CMI Big Tubes headers deliver peak performance and power from naturally aspirated engines. The headers can be built to your custom measurements based on your motor.

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.

Note: All CMI Systems are sold without Tailpipes

CMI Big Block Chevy Big Sport Tube Exhaust System, 2-3/8" Primaries, Polished

These “Big Tubes” offer a large 2 3/8″ primary, straight back superior long tube header designed for both racing or any high-performance application. These leaned, taller headers are commonly used in custom high horsepower builds. These headers feature the CMI Big Tube Flex Flare Tailpipe Connection. For big-block applications, where maximum scavenging and horsepower are required, CMI Big Tube headers deliver peak performance and power from naturally aspirated engines. This is a full polished header.

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.

Note: All CMI Systems are sold without Tailpipes

CMI Big Block Chevy E-Top Platinum Exhaust System - Taller - With Stainless Distribution Tube

These custom size taller, straight back CMI E-Top are a superior long tube header designed for both racing or any high-performance application. These leaned, taller headers are commonly used in custom or staggered setup Mercury 525-700 series motors. These headers feature the CMI Flex Flare Tailpipe Connection. For big-block applications, where maximum scavenging and horsepower are required, CMI Sport Tube headers deliver peak performance and power from naturally aspirated engines. This version has a polished elbow and satin primaries with the rubber distribution tube.

Note: All CMI Systems are sold without Tailpipes

CMI Big Block Chevy E-Top Platinum Exhaust System, Mercury Flat Flange

CMI Elbow Top headers are designed for direct replacement of most stock cast manifolds. Top engine builders and stern drive manufacturers who want to optimize performance of small- or big-block marinized engines prefer CMI Elbow Top headers for their engines. CMI E-Top systems offer separated exhaust passages with long individual exhaust tube runners to minimize cylinder to cylinder influence and improve exhaust gas scavenging, which allows the engine to breathe freely and deliver peak performance power. Each header features a permanently attached, non-adjustable exhaust tailpipe configured to meet precise specifications for standard transom layouts and placement of thru-hull exhaust tips. All CMI Elbow Top Systems include rubber water distribution tubes, cooling water bypass couplings installed on the collector elbow, by-pass hose fittings, attaching cap screws, exhaust port gaskets, hose clamps and cooling water inlet fittings needed for most installations. This header comes with the stainless steel distribution tube upgrade. This header has a polished elbow and satin primaries

This Kit includes an upgrade to a Stainless Steel Water Distribution Tree.

Note: All CMI Systems are sold without Tailpipes