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Vehicle Info NeededDYNOMAXPART NUMBER: 289-35907
Exhaust Flapper Diameter: 4"
$1999
Ships on 09/17/2026
Lowest Price GuaranteeHeader Accessories
- Exhaust Flapper
- Diameter: 4"
These flappers are designed to prevent any debris or moisture from entering your upswept headers (like those on many Super Comp & Comp Dragsters) and getting into your expensive race engine through an open valve when the engine is not running.
- Exhaust construction made easy by Dynomax. Dynomax has a large selection of exhaust accessories to help with your installation. No matter if you are working on a race car, street machine, street car or truck, Dynomax will have the part needed to help complete your installation.
Part TypeExhaust Pipe Rain Cap
Product LineDynomax Exhaust Accessories
BrandDYNOMAX
Package Height3.5
Package Width5.5
Package Length11.0
Weight1.5 PG
Part CategoryPerformance Parts
Exhaust Pipe Rain Cap MaterialSteel
Exhaust Pipe Rain Cap FinishNatural
QuantitySold individually
Exhaust Pipe Rain Cap Inside Diameter4 in (101.6 mm)
Part FitmentUniversal
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
