Granatelli Dual 2.5" Electric Exhaust Cutout Kit, Mild Steel Slip-Fit – 303525D

Granatelli Motor Sports Electronic Exhaust Cutout Kit – 2.5″ Dual System

SKU: 303525D

Electronic Exhaust Cutout Kit Key Features:

• Dual 2.5″ Slip‑Fit Design – Simple clamp‑on installation; universal fit (minor adaptations may be needed)
• Aluminized Mild Steel Body – Combines affordability with resistance to corrosion
• Premium Internal Components – CNC-machined 6061 aluminum housing, stainless steel butterfly plates/shafts, and high-temp carbon steel gears ensure robustness
• “Smart‑Chip” Motor Control – One-touch rocker switch operation protects gears from wear
• High-Torque DC Gear Motor – Delivers reliable, full-range open/close action every time
• Complete Kit Included – Wiring harness, mounting hardware, gaskets, V-band clamp, and polished stainless steel 45° turndowns are all part of the package

Performance Benefits:

• Boosted Flow & Power – Bypass your muffler to cut backpressure, improving engine breathing and acceleration
• Instant Sound Control – From quiet cruising to race-inspired roar—toggle noise levels with ease
• Built for Longevity – Durable steel construction and sealed motor deliver consistent performance

Specifications

Why This Kit Stands Out: Granatelli’s 303525D delivers exceptional value without compromising quality. The smart-chip motor and high-grade internals provide a reliable, hassle-free experience—whether you're cruising or going full throttle. For those seeking dramatic sound and performance gains in a user-friendly package, this kit is a top contender.

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. This dual kit is for true dual exhaust systems, one cutout per side. Single exhaust? Choose the single 303525 kit. Want a permanent, leak-free install? See the 307525K weld-in version. Daily driver in a wet or salted-road climate? Consider the stainless steel 302525K.

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