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4" OD-3 ID Aluminized Reducer and Clamp Set

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4" OD-3 ID Aluminized Reducer and Clamp Set

NOTE: Questions, Call 715-254-2307

Aluminized Exhaust Reducer/Clamp

Reducer: 4 inch outer diameter on one end, to 3 inch slotted, expanded inner diameter heavy duty aluminized steel pipe

8 inch total length

3 inch ID expands to 4 inch OD. Connects our stack installation bed kit to your 3 inch Exhaust

Clamp: 3 inch Accuseal Aluminized Exhaust Clamp

Evenly distributes clamping pressure


  • R4O-3IA Reducer
  • AS-3A Accuseal Clamp
Warranty Information: Chrome-plated (except weld area) and aluminized parts used on heavy duty truck exhaust systems are warranted against defective material and workmanship for a period of 1 year from date of shipment. Call if you have questions on proper installation techniques. Grand Rock and Black Cloud Diesel cannot be held liable for damage done as a result of improper installation. If a part is determined to be defective, Grand Rock and Black Cloud Diesel reserve the right to replate only and return the part when the part has been modified, altered, or otherwise damaged. Neglect is not Warranted! Keep the parts clean & waxed!