Granatelli 2.5" Electric Exhaust Cutout Kit, Stainless Steel Weld-In – 307525

Granatelli 2.5 Inch Electronic Exhaust Cutout Kit

SKU: 307525

Dominate Your Drive—Roar or Ride Silent

Unleash full control over your exhaust with the Granatelli 2.5″ weld-in electronic cutout. Whether you're easing through traffic or launching into full-throttle mode, one push of the Smart‑Chip rocker switch switches your tone instantly. Built rugged for performance, refined for sound—this kit is the silent assassin that hits like a tank on command.

Why This Cutout Stands Out

• Race‑Grade Construction
  • CNC‑machined 6061 aircraft‑grade aluminum body resists heat and warping
  • Corrosion‑resistant stainless‑steel butterfly plates and heavy-duty shafts
• Smart, One‑Touch Reliability
  • Smart‑Chip motor with rocker switch: no holding required
  • Automatic stop protects gears and motor from wear
• Precision Style & Fit
  • Polished stainless-steel turndown with sharp 45° slant
  • 360° rotatable V‑band clamp for perfect exit alignment
• Full‑Cycle Performance
  • High‑torque DC gear‑reduction motor with carbon‑steel gears for consistent operation
• Complete, Clamp‑On Kit
  • Includes cutout, Y‑pipe, wiring harness, rocker switch, gaskets, band clamp & install hardware

Built for Builders Who Demand More

This cutout is crafted for V‑8s, turbo monsters, and street-strip hybrids—you name it. Weld it in, wire it up, and deploy the tone that matches your mood: silent precision, or 100‑percent unfiltered roar. No compromise. Just pure sound control, built tough for the long haul.

Sizing & Fitment

Measure the outside diameter of your exhaust pipe at the mounting point. If it measures 2.5", this kit is the right match. Running a true dual exhaust? Use one cutout per side, or choose the dual 307525K kit. Can't weld? The 302525 slip-fit version installs with clamps.

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?
Weld-in kits need welding equipment or a muffler shop. Prefer to bolt it on? The 302525 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 2.5 Inch Exhaust Cutout Guide for choosing the right size and type, mounting and state laws.

Why Choose Granatelli Motor Sports?

Granatelli Motor Sports develops performance components for real-world street, street/strip, race, and custom applications, with an emphasis on practical performance, dependable construction, and integration into serious automotive builds.