TCM ST-450 Switchable Exhaust Mufflers


TCM ST-450 Switchable Exhaust Mufflers

Teague Custom Marine ST-450 switchable exhaust mufflers give you the best of both worlds: wide open performance and sound, as well as comfortable and legal cruising noise levels. Operated by a switch at the dash, these mufflers feature a solenoid that opens and closes an internal butterfly valve to divert exhaust gasses through an outer jacket. No unsightly and bulky Y-Pipes or pneumatic pump setups required; these are the ultimate marine muffler solution. Now USCG approved and Mercury factory certified for warrantied catalyzed Mercruiser engines!



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  1. $12.75
    Inner Exhaust Flapper Assembly Rebuild Kit (1 flapper) SKU: TCM ST450FLAP
    Manufacturer: TEAGUE CUSTOM MARINE
  2. $137.44
    4 1/2" Inner Exhaust Flapper Assembly kit (1 pair) SKU: TCM ST450IFA
    Manufacturer: TEAGUE CUSTOM MARINE
  3. $22.68
    TCM EXTERNAL 4 1/2" FLAPPER (EACH / 1 piece) SKU: TCM 412SAL
    Manufacturer: TEAGUE CUSTOM MARINE
  4. $1,408.31
    TCM ST-450 SWITCHABLE EXHAUST MUFFLER SYSTEM - 4.5" OD Hose Angled Connection SKU: TCM ST450SSHPCMI
    Manufacturer: TEAGUE CUSTOM MARINE
  5. $1,408.31
    TCM ST-450 SWITCHABLE EXHAUST MUFFLER SYSTEM - 4.5" OD Straight Connection SKU: TCM ST450HEADER
    Manufacturer: TEAGUE CUSTOM MARINE
  6. $8.97
    ST450 Reseal Kit SKU: TCM ST450SEALKIT
    Manufacturer: TEAGUE CUSTOM MARINE
  7. $34.97
    ST450 Rebuild Kit SKU: TCM ST450REBUILD
    Manufacturer: TEAGUE CUSTOM MARINE
  8. $115.50
    Actuator ST450 SKU: SYN 1ZE6U1B1S1
    Manufacturer: TEAGUE CUSTOM MARINE
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