Granatelli 2.25" Electric Exhaust Cutout Kit, Mild Steel Slip-Fit – 303522

Granatelli Motor Sports 2.25″ Electronic Exhaust Cutout Kit – Aluminized Mild Steel

SKU: 303522

Control Your Sound, Elevate Your Drive

Skip the noise or unleash the roar—this smart exhaust cutout gives you full control over your vehicle’s tone and performance, all at the flip of a switch. Ideal for drivers who demand stealth on the street and aggression on command.

Key Features

• Precision CNC-machined 6061 aluminum body for durability and heat resistance
• “Smart Chip” motor with one-touch rocker switch—no need to hold and no risk of gear damage
• Stainless steel butterfly plates and blade shafts for longevity and corrosion resistance
• 360° rotatable V-band turndown with polished stainless slanted exit (45°)—style and fit with attitude
• High-torque DC motor & carbon-steel gears ensure consistent and reliable valve operation
• All-inclusive kit—comes with gaskets, hardware, wiring harness, clamps, and more for an easy install

Perfect For

• Street-tuned and turbocharged builds seeking flexible sound control
• Daily drivers that crave a loud exhaust without sacrificing stealth
• Enthusiasts desiring durability and high-quality components built to withstand heat and vibration

Why It Stands Out

This 2.25″ cutout provides an excellent balance of flow and control—big enough to let your engine breathe, yet compact enough for smooth, everyday driving. With smart-chip technology, it ensures seamless operation and long-term reliability. Plus, its universal slip-fit and band-clamp design make it compatible with most exhaust setups—no custom fab required.

What’s in the Box

Whether you’re cruising quietly or laying down horsepower on demand, the Granatelli 303522 delivers performance and versatility in one sleek package. Reliable, rugged, and ready for action—it’s the cutout that gives your drive dual personalities: refined or raw. Choose your mode, command the exhaust, and let the journey resonate.

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 303522D kit. Want a permanent, leak-free install? See the 307522 weld-in version. Daily driver in a wet or salted-road climate? Consider the stainless steel 302522.

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 2.25 Inch Exhaust Cutout Guide for choosing the right size and type, mounting and state laws.