Chrome Exhaust Rain Cap – Spring-Hinge – 4", 5", 6" Diameters

Spring-hinge chrome rain cap for open truck exhaust stacks — the hinged cap pops open under exhaust pressure and closes automatically when the truck is off, keeping rain, snow, and debris out of the stack. Clamp-on install; fits standard 4", 5", or 6" stack outer diameters.

Key Features

• Spring-hinge lid — pops open under exhaust pressure, drops closed when the engine is off
• Keeps rain, snow and road debris out of an open stack
• Integral band clamp with cinch bolt — no separate clamp to buy
• Chrome-plated heavy-gauge steel with a high-temperature coating
• Sold as a pair — one cap for each stack
• Choose 4", 5" or 6" to match your stack outer diameter

Body Dimensions

• Fits stack outer diameter: varies by variant — see the size selector
• Overall length across the hinge arm: ~10.24" / 26 cm
• Spring-hinge design — opens automatically under exhaust pressure

What's in the Box

• 2 × spring-hinge rain cap — diameter as selected
• Integral band clamp with cinch bolt and nut, fitted to each cap

SKU Reference

• 4" → SKU PL-ERC4-2
• 5" → SKU PL-ERC5-2
• 6" → SKU PL-ERC6-2

Note: Measure the outer diameter of your stack and order the matching size. The band clamp is part of the cap — no separate exhaust clamp is required. Sold as a pair.