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30 Days Easy Return. We are the largest supplier of the most adaptable, personalized hardware in the industry. We work hard to ensure you're satisfied with our products.
WARNING: This Product May Contain Chemicals Known to the State of California to Cause Cancer or Reproductive Harm. To Learn More Visit P65Warnings.ca.gov
Features
- Engineered to meet or exceed OEM specifications
- Adds 3" of height to exhaust riser to prevent back-flow issues or add exhaust hose clearance
- Compatible with manifolds used on 229 and 262 cu. in V6 and 305-350 cu. in. Small Block V8 and 454 cu. in Big Block V8 engines
- Requires one ea: 18-0897, 18-0672, and 18-2849-1 gaskets
- For a complete kit with two spacers, gaskets, bolts and plugs use Sierra p/n 18-1908K
- Backed by SeaStar Solutions Limited Two-Year Warranty
Dimensions
3"
Type
Spacers
Product Overview
Increase riser height for hose clearance or put exhaust outlets further above the waterline 3" can make a big difference in combatting back-flow issues on engines installed close to the transon or waterline. These Sierra spacers provide the extra height to prevent water from traveling back into the riser when throttling down and can also provide added clearance for exhaust hose routing. Engineered to be compatible with many GM based V-6, small block and big block engines. For 50 years Sierra has been producing parts engineered to meet or exceed the specifications of marine engine manufacturers and has gained the confidence of engine manufacturers and boat builders to a point of supplying them with OEM parts. Boaters and technicians can be assured a Sierra part will fit right the first time and restore function to manufacturers' standards.