Granatelli 2.25" Electric Exhaust Cutout Kit, Stainless Steel Weld-In – 307522

Granatelli 2.25″ Electronic Exhaust Cutout Kit

SKU: 307522

Take control of your exhaust with precision, performance, and effortless style—this universal, weld-in electronic cutout is built for enthusiasts who demand quality and dynamic functionality.

Effortless One-Touch Operation

• CNC-machined 6061 aircraft-grade aluminum motor housing ensures long-term strength and heat resistance.
• Smart-Chip controlled DC motor delivers smooth torque with automatic shut-off—no need to hold the switch and risk gear wear.

Adjustable Sound & Flow Control

• Fits any 2.25″ (57 mm) exhaust system with minimal restriction when closed—and an aggressive tone when opened.
• Polished stainless-steel butterfly valve and shaft handle high-heat performance without compromise.
• 45° stainless turndown with 360° adjustable V-band clamp allows precision exhaust exit angle.

Complete Weld-In Installation Kit

• Kit includes: cutout assembly, Y-pipe, rocker switch, wiring harness, gaskets, V-band clamps, and mounting hardware.
• Universal fit for custom exhaust builds using 2.25″ piping.

Built to Last

• All moving parts are sealed and protected from road elements, vibration, and high temps.
• Heat-resistant carbon steel gears and corrosion-proof stainless construction ensure long-term reliability.

Why It’s a Must-Have

• Toggle between stealth mode and open exhaust performance on demand.
• Perfect for street and race applications where sound and flow control matter.
• Easy one-touch control with Smart-Chip auto-stop to protect the system.

Technical Specifications

Summary

The Granatelli 307522 electronic exhaust cutout kit offers clean one-touch control, bold tone customization, and rugged construction—all built into a smart, weld-in setup. Whether you're going for stealth or performance, this kit gives you the power to choose at the flick of a switch.

Sizing & Fitment

Measure the outside diameter of your exhaust pipe at the mounting point. If it measures 2.25", this kit is the right match. Running a true dual exhaust? Use one cutout per side, or choose the dual 307522D kit. Can't weld? The 302522 slip-fit version installs with clamps.

Where to Mount It

Mount the cutout at least 18" from the cylinder head and any O2 sensor, and always after the catalytic converters. 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?
Weld-in kits need welding equipment or a muffler shop. Prefer to bolt it on? The 302522 is a slip-fit version.

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 sizing, installation, dyno results and state laws.

Products received may vary slightly from images due to manufacturing tolerances or supply chain variables.