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

🔧4-inch OD universal fit

⚙️3.75-inch removable reducer

🛡️2 stainless steel clamps included

Frequently Bought Together

Description

⚡ Upgrade your airflow game with Spectre’s sleek 4" intake coupler!

BUILT TO LAST - Includes two corrosion-resistant stainless steel worm gear clamps for secure, long-lasting hold.
CUSTOMIZABLE AIRFLOW - Removable 3.75-inch reducer lets you tailor your intake setup with precision.
LIGHTWEIGHT COMPACT - At just 204g and 10cm³, it’s engineered for easy installation without bulk.
SEAMLESS 4 CONNECTION - Effortlessly link any 4-inch OD intake tubes for a perfect fit every time.
ENGINEERED FOR NATURALLY ASPIRATED - Optimized for non-turbocharged engines to maximize airflow efficiency.

The Spectre Performance 9771 Black 4" Intake Coupler is a precision-engineered connector designed to join any 4-inch outside diameter air intake tubes. Featuring durable stainless steel worm gear clamps and a removable 3.75-inch reducer, it offers customizable airflow solutions for naturally aspirated engines. Lightweight and compact, it ensures a secure, corrosion-resistant fit that enhances your vehicle’s breathing without the complexity of forced induction setups.

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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