Piranha Propellers Performance Kit B-Series 3-Blade | 4" Gearcase 70–150HP & Cobra 400 I/O

Piranha Propellers Performance Kit B-Series 3-Blade — Complete On-Water Backup + Hydrofoil Performance Upgrade for 70–150HP Outboards & Cobra 400 I/O

You can't predict when you'll hit a submerged object — but you can be completely ready for it. The Piranha B-Series 3-Blade Performance Kit gives you everything in the Propulsion Kit, plus a Piranha Hydrofoil Stabilizer that delivers a real, measurable performance boost every time you're on the water. Faster plane. Better lift. Less strain on your engine. And if you ever do take a blade strike, you're back running in minutes.

Backed by a lifetime hub assembly guarantee and proudly Made in the USA.

Specifications

• Application: 4" Gearcase Diameter — Cobra 400 I/O | 70–150HP Outboards
• Blade Configuration: 3-Blade, Right Hand
• Blade Material: High-strength aerospace composite
• Hub Core: Aluminum core over-molded with aerospace composite
• Technology: HydroBites precision ridges (hole shot, vibration, ventilation control)
• Guarantee: Lifetime hub assembly guarantee

Kit Includes:

• 1 × Piranha Propellers Hub Kit
• 2 × Piranha Propellers Blade Sets
• 1 × Piranha Propellers Floating Prop Wrench Kit
• 1 × Piranha Propellers Self-Draining Gear Bag
• 1 × Piranha Propellers Hydrofoil Stabilizer

A complete Piranha Propeller consists of the Hub, 3 Blades, and the Cap.

The Hydrofoil Advantage

The Piranha Hydrofoil Stabilizer bolts directly to the anti-ventilation plate on your drive — no drilling, no permanent modifications. Once installed, it generates hydrodynamic lift at the stern, delivering:

• Faster plane — up on plane quicker, usually at a lower speed
• Better performance under load — especially useful when running heavily loaded or towing skiers
• Improved fuel efficiency — less time at high throttle getting on plane means less fuel burned
• Reduced porpoising — smoother ride in choppy conditions

Why the Performance Kit Beats a Spare Prop

With Piranha, carry spare blades and the tools to swap them. This kit gives you two full blade sets, a floating prop wrench, and a self-draining gear bag — everything needed to complete a field repair in under 5 minutes on the water. Since you can't break more blades than are on the prop, two full sets covers any realistic strike scenario while keeping your propeller properly balanced and at the correct pitch.

Why B-Series 3-Blade Outperforms Standard Aluminum Props

• HydroBites technology — precision ridges improve hole shot, reduce vibration, and control ventilation in tight turns
• Shock-absorbing blade design — absorbs prop-strike impact and protects your lower unit, gears, and prop shaft
• Aluminum-core center hub over-molded with high-strength aerospace composite
• Stronger than aluminum — outlasts traditional metal props in salt and fresh water
• Corrosion-resistant — no rust, no pitting, season after season
• Repair or re-pitch in minutes — no special tools required
• Saves on repair costs — replace only the blade, not the entire propeller
• Made in the USA — lifetime hub assembly guarantee included

Installation Notes

• Hydrofoil Stabilizer bolts to anti-ventilation plate — no drilling, no permanent modification required
• Hydrofoil installation: approximately 15–30 minutes with basic hand tools; fully removable
• Blade swap: field-replaceable in under 5 minutes on the water with the included floating prop wrench
• Confirm 4" gearcase diameter fitment for your specific engine make and model before ordering
• Always carry both blade sets on board — propeller balance and pitch depend on using matched blades

Additional Information

• Vendor: Piranha Propellers
• SKU: PERFMKITB-3B (base)
• Product Type: Piranha Performance Kit
• Country of Origin: USA
• HS Code: 8487.90 (propeller parts and accessories — verify for your import classification)

Frequently Asked Questions

Q: What's the difference between the Performance Kit and the Propulsion Kit?
A: Both kits include the same hub kit, two blade sets, floating prop wrench, and self-draining gear bag. The Performance Kit adds a Piranha Hydrofoil Stabilizer — a bolt-on device that mounts to your anti-ventilation plate and generates stern lift for faster planing and better efficiency. If you want the backup system plus a real performance upgrade, the Performance Kit is the better choice.

Q: How does the Hydrofoil Stabilizer install?
A: The Piranha Hydrofoil bolts directly to the anti-ventilation plate on your outboard or I/O — no drilling required. Installation typically takes 15–30 minutes with basic hand tools and is fully reversible.

Q: Will the Hydrofoil make a noticeable difference on my 70–150HP outboard?
A: Yes — the effect is most pronounced on boats run under load or used for watersports. Expect faster plane time, a lower planing speed, and a smoother ride in choppy conditions. Heavily loaded boats and ski boats see the biggest gains.

Q: Why does the kit include two blade sets instead of one?
A: One blade set gets you back on the water after a strike — two sets keep you there for the rest of the season. Two full sets ensure your propeller stays properly balanced and at the correct pitch no matter what happens.

Q: What engines is the B-Series 3-Blade compatible with?
A: The B-Series 3-Blade is designed for 4" gearcase diameter applications — Cobra 400 I/O and 70–150HP outboards. Confirm fitment for your specific engine make and model before ordering.

Q: How does Piranha composite compare to a standard aluminum propeller?
A: Piranha's aerospace-grade composite is stronger than aluminum, lighter, and completely corrosion-resistant. When an aluminum prop gets damaged, you replace the whole thing. With Piranha, you replace only the damaged blade — in minutes, on the water — at a fraction of the cost.