Yes, it comes with a reducer rubber ring that can be removed to fit 3.75" tubing.

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Spectre Performance 9771 Black 4" Intake Coupler

Q: The ones i wanted are used on spe-733 and spe-9751 the unit i bought. not available without buying the whole system again?

A couple of years ago, I purchased this individually and worked great for my LS intake tubing. Good Luck

Q: Why is this not recommended for Turbo/Supercharged engines?

I cannot answer about the turbo/supercharged engines. My application was for an LS normal aspirated intake tubing and it worked great.

Product ID: 86759839

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Details

Size
3.5 inches
Material
Stainless
Brand
Spectre
Colour
Black
Item dimensions L x W x H
10.2 x 10.2 x
Connector type
Reducer

🔄3.75-inch removable reducer

🔩4-inch OD universal fit

🛠️2 stainless steel worm gear clamps

Frequently Bought Together

Description

🔧 Upgrade your airflow game with precision and style!

CUSTOMIZABLE AIRFLOW - Use the removable 3.75-inch reducer to fine-tune your intake system’s performance.
LIGHTWEIGHT YET ROBUST - At just 204 grams, it balances strength and minimal weight for easy handling.
SEAMLESS 4 CONNECTION - Effortlessly link any 4-inch OD intake tubes for a perfect fit every time.
DURABLE STAINLESS STEEL CLAMPS - Secure your setup with corrosion-resistant worm gear clamps built to last.
ENGINEERED FOR NATURALLY ASPIRATED SETUPS - Optimized for non-turbocharged engines to maximize airflow efficiency.

The Spectre Performance 9771 Black 4" Intake Coupler is a lightweight, durable connector designed to join any 4-inch outside diameter air intake tubes. It includes two stainless steel worm gear clamps for secure fastening and a removable 3.75-inch reducer for customizable airflow. Ideal for naturally aspirated engines, this coupler ensures a reliable and efficient intake setup.

Specifications

Manufacturer	Spectre
Brand	Spectre
Product Dimensions	10.16 x 10.16 x 10.16 cm; 204.11 g
Item model number	SPE-9771
Exterior	Stainless Steel
Manufacturer part number	9771
OEM Part Number	9771
Item Weight	204 g

Have a Question? See What Others Asked

will it fit 3.75" ??

The ones i wanted are used on spe-733 and spe-9751 the unit i bought. not available without buying the whole system again?

What is the id? i'm using this on a dust collection system with fitting that are 4" od

Why is this not recommended for Turbo/Supercharged engines?

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