Granatelli Motor Sports 3.50 Inch HD Clamshell 318535CS

Granatelli Motor Sports Dual Seal HD 3.5 Inch Tubing Coupler Clamp

SKU: 318535CS

Heavy-Duty Quick-Release Clamshell Clamp for Turbo and High-Boost Systems

The Granatelli Motor Sports Dual Seal HD 3.5 Inch Tubing Coupler Clamp is engineered for extreme performance applications where secure sealing, durability, and fast serviceability are critical. Fabricated exclusively from T-6061 aluminum, this clamp offers exceptional strength while remaining lightweight—ideal for turbocharged and high-horsepower builds.

Utilizing Granatelli’s patented pin-and-ball quick-release clamping mechanism, this clamshell-style clamp provides a positive mechanical lock that resists vibration, boost pressure, and thermal expansion. Designed specifically for 3.5-inch (88.90mm) aluminum tubing couplers, it ensures reliable, leak-free sealing in demanding turbo intake and charge pipe systems.

Product Specifications

• Tubing Coupler Type: Straight
• Material: T-6061 Aluminum
• Finish: Black
• Inlet Diameter: 3.50 in. (88.90 mm)
• Outlet Diameter: 3.50 in. (88.90 mm)
• Quantity: Sold individually

Performance Features

• Dual-seal HD design for consistent, leak-free boost retention
• Pin-and-ball quick-release system for rapid installation and removal
• Vibration-resistant under high boost and aggressive engine movement
• Maintains sealing integrity under extreme pressure and temperature
• Ideal for repeated servicing without clamp fatigue

Included Components

• One heavy-duty outer clamp assembly
• One ball/pin safety retention pin

Designed for professional fabricators, racers, and performance enthusiasts, the Granatelli Motor Sports Dual Seal HD 3.5 Inch Clamshell Clamp is the ideal solution for turbocharged intake systems, charge piping, intercooler connections, and high-boost forced-induction applications. When reliability, serviceability, and performance matter most, Granatelli Motor Sports delivers.

Key Features & Benefits

• Application-focused Granatelli Motor Sports design
• Built for dependable performance and service
• Designed for enthusiasts, professional installers, and performance builds

Fitment & Installation

Confirm the part number, vehicle or engine application, dimensions, and supporting components before installation. Modified vehicles may require additional clearance, fabrication, calibration, or related hardware depending on the combination.

Frequently Asked Questions

How do I confirm fitment?
Match the part number and listed application to your vehicle, engine, dimensions, and supporting components before ordering.

Will this work on a modified vehicle?
Compatibility depends on the complete vehicle combination. Confirm the listed application and supporting components before installation.

Why Choose Granatelli Motor Sports?

Granatelli Motor Sports develops performance components for real-world street, street/strip, race, and custom applications, with an emphasis on practical performance, dependable construction, and integration into serious automotive builds.