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

SpectrePerformance 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: 269993417

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Details

Size
Klein
Material
EPDM/TPE
Brand
Spectre
Colour
Black
Item dimensions L x W x H
10.2 x 10.2 x

📏4-inch OD perfect fit

🔄3.75-inch removable reducer

🔩2 stainless steel clamps included

Frequently Bought Together

Description

⚙️ Upgrade your airflow game with precision and style!

LIGHTWEIGHT COMPACT - At just 204g and 10cm³, it’s engineered for performance without bulk.
SEAMLESS 4 CONNECTION - Effortlessly link any 4-inch OD tubes for a flawless airflow setup.
CUSTOMIZABLE AIRFLOW FIT - Includes a removable 3.75-inch reducer for versatile installation options.
SLEEK MATTE BLACK FINISH - Elevate your engine bay with a stealthy, professional look that stands out.
DURABLE STAINLESS STEEL CLAMPS - Secure your intake with corrosion-resistant worm gear clamps built to last.

The Spectre Performance 9771 is a high-quality 4-inch intake coupler designed to connect air intake tubes seamlessly. Featuring two stainless steel worm gear clamps and a removable 3.75-inch reducer, it offers durable, customizable installation. Finished in sleek black and lightweight at 204 grams, it’s ideal for naturally aspirated engines seeking reliable airflow enhancement.

Specifications

Manufacturer	Spectre
Brand	Spectre
Model	9771
Product Dimensions	10.16 x 10.16 x 10.16 cm; 204.11 g
Item model number	SPE-9771
Exterior	Black
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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