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97511 Spectre Duct Boot
- Connects to a 4 inch tube
- Helpful for creating a custom intake system
- PVC with integrated threads for better sealing
- Use with memory flex ducting
Package Contents | 1 Coupler |
Package Quantity | 1 |
Warranty | 90 Days |
Product Style | Spectre Coupler/Reducer |
Inlet Diameter | 4 in (102 mm) |
Width | 4 in (102 mm) |
Length | 2.5 in (64 mm) |
Outlet Diameter | 3.75 in (95 mm) |
Weight | 0.3 lb (0.1 kg) |
Product Box Height | 5.5 in (140 mm) |
Product Box Length | 2.5 in (64 mm) |
Product Box Width | 2.5 in (64 mm) |
Color | Black |
Material Used | PVC |
Mounting Hardware Included | No |
Spectre Performance Products
POLE POSITION PERFORMANCE
Products designed and tested to perform and last.

Air Intake Systems
Spectre air intakes are manufactured from high quality polished or powder coated aluminum tubing and come complete with a high flow air filter engineered to increase airflow and performance.

Replacement Air Filters
Spectre air filter products are designed to increase power and torque for your engine.

Accessories
Explore your vehicle’s individuality with precisely designed accessories from Spectre—engineered for functionality and a custom, elegant appearance.

Intake Components
Spectre offers air intake components for DIY car enthusiasts so they can design and build a cold air intake for their modified car or truck.
Our Story
Why Spectre?
From humble beginnings in a two car garage, to setting world records and becoming the first wheel driven, gasoline powered car to run over 400 mph, it's been one heck of a ride.