Summer fun has begun! It's a boatin' great day - Save up to 50% Off during our Great Days of Summer Sale.

Crusader Exhaust Protector Valves

Blowout
Save 26%-35% Off.
Exhaust Protector Valve - 18-4456 - Sierra
Great Days Sale Price: $20.69
Save: $7.80
(27% Off $28.49)
Part # 18-4456 ValueShip™ Eligible
SHIPS TOMORROW!* if ordered in 21 hrs 43 mins.
No Reviews | Write Review | Ask Question
Includes Stainless Steel Clamp 3"

Replaces OEM part #
  • MERCURY MARINE 34765A 2
  • MERCURY MARINE 34765A1
Exhaust Flapper, 4" - 18-4457 - Sierra
Your Price: $22.81
Save: $7.52
(24% Off $30.33)
Part # 18-4457 ValueShip™ Eligible
SHIPS TOMORROW!* if ordered in 21 hrs 43 mins.
No Reviews | Write Review | Ask Question
Includes Stainless Steel Clamp 4"

Replaces OEM part #
  • MERCURY MARINE 12644A1
  • MERCURY MARINE 12644A1
Exhaust Protector Valve - 18-4458 - Sierra
Great Days Sale Price: $41.99
Save: $12.82
(23% Off $54.81)
Part # 18-4458 ValueShip™ Eligible
SHIPS TOMORROW!* if ordered in 21 hrs 43 mins.
No Reviews | Write Review | Ask Question
Includes Stainless Steel Clamp
Fits both 5" & 6" Exhaust
Mallory Exhaust Flapper 5-6" 9-44002
Mallory Exhaust Flapper 5-6" 9-44002
Great Days Sale Price: $34.42
Save: $18.75
(35% Off $53.17)
Part # 9-44002 ValueShip™ Eligible
SHIPS TOMORROW!* if ordered in 21 hrs 43 mins.
Hurry! Only 1 left in stock
No Reviews | Write Review | Ask Question
Replaces GLM #:89260
Replaces Original Equipment Manufacturer(OEM):Universal
Replaces Original Equipment Manufacturer # (OEM #):n/a
Fits Application:Universal
Sierra
Ask a question for
Question & Answer Guidelines
This product ships in 1 business day.

Add to Cart and enter your Postal Code to determine the shipping charges and estimated delivery date.
* Most products and orders leave our warehouse in 1 business day. However, select items may take more processing time. Alaska and Hawaii orders please add 1 additional warehouse processing day.
Standard Shipping Policies
Over 35,000 boat parts & accessories now on sale!
Shop the Great Days of Summer Sale and save!