Spectre Coupler/Reducer 4in. to 3.5in. (PVC) - Black

SKU: SPE9741
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About Spectre

Spectre engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Spectre lineup with fast shipping and expert fitment support — order with confidence.

Spectre Universal Intake Coupler/Reducer - 4" to 3.5" (Black PVC)

Seamlessly connect different diameter components in your custom air intake system with the Spectre Universal Intake Coupler/Reducer. This black PVC adapter is specifically designed to bridge the gap between a 4-inch outside diameter tube or component and a 3-1/2-inch outside diameter tube or component. Measuring 3 inches in length, it provides a secure and reliable transition for your intake plumbing.

Product Specifications & Features:

  • Type: Coupler/Reducer
  • Material: Durable Black PVC
  • Connection Sizes: Adapts 4" OD to 3.5" OD
  • Length: 3 inches
  • Included: 2 x Stainless Steel Worm Gear Hose Clamps
  • Application: Air intake systems, NOT for pressurized applications (e.g., turbo/supercharger outlets).

This coupler is an essential part for custom fabrication projects, allowing enthusiasts to mix and match intake tubing sizes or connect aftermarket components to factory intake sections. The included stainless steel worm gear hose clamps ensure a tight and leak-free seal, providing peace of mind that your intake system is functioning optimally. Its robust PVC construction is designed to withstand typical under-hood temperatures and conditions associated with air intake systems.

Benefits:

  • Facilitates custom intake system configurations.
  • Ensures a secure connection between different tube sizes.
  • Includes necessary hardware (hose clamps) for installation.
  • Durable construction for reliable performance.
  • Cost-effective solution for intake modifications.

Please note that this coupler is intended for non-pressurized intake applications only. It is not suitable for use on the outlet side of turbochargers or superchargers. Ensure proper fitment for your specific application. Find this essential adapter and other intake components at GGCRACING.

Product Details

Product Description
Part Numbers
Sizing & Fit

About Spectre

Spectre engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Spectre lineup with fast shipping and expert fitment support — order with confidence.

Spectre Universal Intake Coupler/Reducer - 4" to 3.5" (Black PVC)

Seamlessly connect different diameter components in your custom air intake system with the Spectre Universal Intake Coupler/Reducer. This black PVC adapter is specifically designed to bridge the gap between a 4-inch outside diameter tube or component and a 3-1/2-inch outside diameter tube or component. Measuring 3 inches in length, it provides a secure and reliable transition for your intake plumbing.

Product Specifications & Features:

  • Type: Coupler/Reducer
  • Material: Durable Black PVC
  • Connection Sizes: Adapts 4" OD to 3.5" OD
  • Length: 3 inches
  • Included: 2 x Stainless Steel Worm Gear Hose Clamps
  • Application: Air intake systems, NOT for pressurized applications (e.g., turbo/supercharger outlets).

This coupler is an essential part for custom fabrication projects, allowing enthusiasts to mix and match intake tubing sizes or connect aftermarket components to factory intake sections. The included stainless steel worm gear hose clamps ensure a tight and leak-free seal, providing peace of mind that your intake system is functioning optimally. Its robust PVC construction is designed to withstand typical under-hood temperatures and conditions associated with air intake systems.

Benefits:

  • Facilitates custom intake system configurations.
  • Ensures a secure connection between different tube sizes.
  • Includes necessary hardware (hose clamps) for installation.
  • Durable construction for reliable performance.
  • Cost-effective solution for intake modifications.

Please note that this coupler is intended for non-pressurized intake applications only. It is not suitable for use on the outlet side of turbochargers or superchargers. Ensure proper fitment for your specific application. Find this essential adapter and other intake components at GGCRACING.

Product Details

Product Description

About Spectre

Spectre engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Spectre lineup with fast shipping and expert fitment support — order with confidence.

Spectre Universal Intake Coupler/Reducer - 4" to 3.5" (Black PVC)

Seamlessly connect different diameter components in your custom air intake system with the Spectre Universal Intake Coupler/Reducer. This black PVC adapter is specifically designed to bridge the gap between a 4-inch outside diameter tube or component and a 3-1/2-inch outside diameter tube or component. Measuring 3 inches in length, it provides a secure and reliable transition for your intake plumbing.

Product Specifications & Features:

  • Type: Coupler/Reducer
  • Material: Durable Black PVC
  • Connection Sizes: Adapts 4" OD to 3.5" OD
  • Length: 3 inches
  • Included: 2 x Stainless Steel Worm Gear Hose Clamps
  • Application: Air intake systems, NOT for pressurized applications (e.g., turbo/supercharger outlets).

This coupler is an essential part for custom fabrication projects, allowing enthusiasts to mix and match intake tubing sizes or connect aftermarket components to factory intake sections. The included stainless steel worm gear hose clamps ensure a tight and leak-free seal, providing peace of mind that your intake system is functioning optimally. Its robust PVC construction is designed to withstand typical under-hood temperatures and conditions associated with air intake systems.

Benefits:

  • Facilitates custom intake system configurations.
  • Ensures a secure connection between different tube sizes.
  • Includes necessary hardware (hose clamps) for installation.
  • Durable construction for reliable performance.
  • Cost-effective solution for intake modifications.

Please note that this coupler is intended for non-pressurized intake applications only. It is not suitable for use on the outlet side of turbochargers or superchargers. Ensure proper fitment for your specific application. Find this essential adapter and other intake components at GGCRACING.

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