CMI

Performance marine exhaust, built to run

CMI

Authorized Dealer
Follow this brand:

Upgrade your exhaust with confidence

From replacement gaskets to stainless components, CMI parts help keep your boat running clean and strong. Get fast shipping and support from Lotz Outdoors.

Shop CMI

Top sellers from this brand

View all
CMI Kids Seat Harness - Secure and Comfortable Safety Solution
CMI Kids Seat Harness - Secure and Comfortable Safety Solution
$103.00
$103.00
$103.00
Add to cart
CMI Ropewalker Arborist AL - Premium Climbing Rope for Arborists
CMI Ropewalker Arborist AL - Premium Climbing Rope for Arborists
$118.90
$118.90
$118.90
Add to cart
CMI Ropewalker Ascender AL - Efficient Climbing Tool
CMI Ropewalker Ascender AL - Efficient Climbing Tool
$124.85
$124.85
$124.85
Add to cart
CMI Ropewalker Ascender SS - Part Number 434348
CMI Ropewalker Ascender SS - Part Number 434348
$137.35
$137.35
$137.35
Add to cart
Sort by
Filter and sort
Filter and sort

159 products

Clear

159 products

  • 2 3/8" Orange Al Shv Ball Brng
    2 3/8" Orange Al Shv Ball Brng
    $118.60
    $118.60
    $118.60
    Add to cart
  • 4" Ss Al Shv Ball Brng
    4" Ss Al Shv Ball Brng
    $185.00
    $185.00
    $185.00
    Add to cart
  • 2" Ss Al Shv Ball Brng
    2" Ss Al Shv Ball Brng
    $84.40
    $84.40
    $84.40
    Add to cart
  • CMI Trolley Lanyard - Perfect for Safety and Convenience
    CMI Trolley Lanyard - Perfect for Safety and Convenience
    $48.70
    $48.70
    $48.70
    Add to cart
  • CMI Daisy Chain 72" Black - Durable Climbing Gear
    CMI Daisy Chain 72" Black - Durable Climbing Gear
    $82.30
    $82.30
    $82.30
    Add to cart
  • CMI Daisy Chain 24" Assorted Colors - Versatile Gear for Outdoor Adventures
    CMI Daisy Chain 24" Assorted Colors - Versatile Gear for Outdoor Adventures
    $28.20
    $28.20
    $28.20
    Add to cart
  • CMI Daisy Chain 24" Black - Durable Climbing Accessory
    CMI Daisy Chain 24" Black - Durable Climbing Accessory
    $28.20
    $28.20
    $28.20
    Add to cart
  • CMI Sewn Runner 1" x 96" Assort - Versatile Decorative Accent
    CMI Sewn Runner 1" x 96" Assort - Versatile Decorative Accent
    $36.10
    $36.10
    $36.10
    Add to cart
  • CMI Sewn Runner 1" x 72" Assort - Versatile Decorative Table Runner
    CMI Sewn Runner 1" x 72" Assort - Versatile Decorative Table Runner
    $22.70
    $22.70
    $22.70
    Add to cart
  • CMI Sewn Runner 1" x 60" Assorted Colors - Durable and Versatile
    CMI Sewn Runner 1" x 60" Assorted Colors - Durable and Versatile
    $19.50
    $19.50
    $19.50
    Add to cart
  • CMI Sewn Runner 1" x 20" Assort - Versatile Crafting Solution
    CMI Sewn Runner 1" x 20" Assort - Versatile Crafting Solution
    $12.62
    $12.62
    $12.62
    Add to cart
  • CMI Sewn Runner 1" x 48" Assort - Versatile Decorative Accent
    CMI Sewn Runner 1" x 48" Assort - Versatile Decorative Accent
    $16.20
    $16.20
    $16.20
    Add to cart

About CMI

Custom Marine Inc., known as CMI, is a marine performance manufacturer recognized for stainless steel exhaust systems and components built for serious power and long days on the water. CMI works with engine builders, OEM boat manufacturers, and distributors who rely on consistent quality and race-proven results.

From headers and tailpipe components to gaskets, hardware, and the small parts that keep a system sealed and running right, CMI parts are designed for real-world service and dependable installation. If you are refreshing a setup or keeping a boat ready for the next season, these components help you maintain performance without guesswork.

At Lotz Outdoors we stock CMI parts for boaters and technicians who want durable stainless components, quick shipping, and support from a team that understands marine rigging and maintenance.

Warranty

Standard Elbow Top headers are warranted for two years from date of manufacture, all other headers and exhaust components are warranted for one year, defects in materials and workmanship to the original buyer.

View warranty details

CMI Customer Service

920-722-7084

For product-specific support, warranty claims, and technical questions, contact the brand directly.

Other brands you may like

Whale Marine

Bennett Marine

Lenco Marine

CMI FAQs

What is CMI known for?

CMI, Custom Marine Inc., is known for high-performance stainless steel marine exhaust systems and the components that support them, including header and tailpipe parts, hardware, and replacement pieces built for demanding on-water use.

Where are CMI products made?

CMI manufactures marine exhaust products in the United States, supporting OEM builders and performance boaters with American-made stainless components.

Does CMI offer a warranty?

Yes. CMI provides a limited warranty that covers defects in materials and workmanship for the original buyer. Standard Elbow Top headers are warranted for two years from the date of manufacture, and most other headers and exhaust components are warranted for one year.

What makes CMI exhaust components different?

CMI parts are built around fitment, durability, and consistent performance. Stainless construction and proven designs help reduce guesswork during installation and keep systems running reliably in harsh marine conditions.

What types of products does CMI make?

CMI makes marine exhaust headers and related exhaust components, plus supporting parts like gaskets, clamps, fittings, and hardware used to build, service, or refresh performance marine exhaust systems.