Granatelli 3" Electric Exhaust Cutout Kit, Mild Steel Slip-Fit – 303530

Granatelli Motor Sports 3.0" Electronic Exhaust Cutout Kit

SKU: 303530

Unleash the Beast or Keep It Civil—You Choose

Want your car to whisper or roar—without lifting the hood? The Granatelli 3.0" Electronic Exhaust Cutout Kit gives you the power to change your exhaust tone and performance instantly. Whether you're rolling through the neighborhood or unleashing everything on the open road, this kit delivers full control at the press of a button. Built tough with aircraft-grade materials and engineered for real-world abuse, this is a must-have mod for anyone who lives for the drive.

Instant Sound Shift

• Precision CNC-machined from 6061 aircraft-grade aluminum for lightweight durability.
• “Smart-Chip” controlled high-torque DC motor delivers effortless one-touch open and close with auto-stop to protect internal gears.
• Robust stainless-steel butterfly valve and shaft powered by heat-resistant carbon-steel gears for smooth, reliable operation—even under extreme conditions.

Customizable Fit & Flow

• Includes a 45° stainless oval turndown and adapter, secured with V-band clamps for full 360° adjustability.
• Designed for clean slip-fit installation in 3.0″ (76 mm) exhaust systems—perfect balance between flow and ground clearance.

Complete, Ready-to-Install Kit

• Comes with everything you need: gaskets, hardware, wiring harness, and control switch for a professional-grade setup.

Built Tough for the Long Haul

• Gear-driven motor ensures precise open/close cycles every time.
• 6061 aluminum and stainless steel construction offers high corrosion resistance and keeps it looking and performing like new.

Why Choose This Kit?

• Instant sound control – from quiet cruise to aggressive growl on demand.
• Performance boost – opens up flow to improve horsepower and throttle response.
• All-in-one solution – no extra parts needed, just professional installation.
• Durable build quality – premium materials and smart electronics for lasting performance.

Specs at a Glance

Take Full Control of Your Exhaust

Why settle for a one-size-fits-all exhaust? With the Granatelli 3.0″ Electronic Exhaust Cutout Kit, your car can stay quiet when you need it and loud when you want it. Simple to use, brutally effective, and built to last—this is the upgrade your build’s been begging for. Dial in your sound. Unleash your performance. Own every mile.

Sizing & Fitment

Measure the outside diameter of your exhaust pipe at the mounting point. If it measures 3", this kit is the right match. Running a true dual exhaust? Use one cutout per side, or choose the dual 303530D kit. Want a permanent, leak-free install? See the 307530 weld-in version. Daily driver in a wet or salted-road climate? Consider the stainless steel 302530.

Where to Mount It

Mount the cutout at least 18 to 24 inches after the catalytic converters, and away from any O2 sensor. Aim the turndown toward the rocker panel, away from fuel and brake lines. For the best sound, mount it after the X-pipe or H-pipe.

Legal Note

Many states, including California, prohibit exhaust cutouts on vehicles driven on public roads. Keep the cutout closed on the street and open it only at sanctioned off-highway events. Never install a cutout upstream of a catalytic converter.

Frequently Asked Questions

Do I have to hold the switch?
No. The Smart-Chip one-touch rocker completes the valve's travel with one tap.

Can I install it myself?
Yes. This kit clamps onto the pipe, so most installs need only basic hand tools and a way to cut the pipe.

What's the warranty?
90 days, with optional 1-, 2- or 3-year extended coverage available at checkout.

Will it add horsepower?
Opening the cutout reduces backpressure. Gains depend on your engine, headers and tune.

New to cutouts? Read our 3 Inch Electric Exhaust Cutout Guide for choosing the right size and type, mounting and state laws.