The C6 exhaust landscape has a new benchmark for versatility and flow. The Ultimate NPP V2 by Concept 841 is engineered to bridge the gap between a refined cruiser and a high-performance powerhouse. By taking the proven architecture of the V1 and expanding its capabilities, Concept 841 has created a system that stands alone in both technical specs and acoustic range.

At CorvetteExhaustSystems.com, we recognize this as one of the most unique configurations on the market, specifically designed for those who want a deep, aggressive tone without permanent compromise.

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Industry-Leading Valve & Flow Engineering

The Ultimate NPP V2 is defined by its massive scale. While standard aftermarket systems typically utilize 3-inch valves, Concept 841 features 3.5-inch valves—the largest available for the C6 platform.

• Vacuum-Operated Dual Mode: These oversized valves are vacuum-operated, allowing for seamless integration with your Corvette’s existing OEM NPP hardware or aftermarket vacuum controllers.
• Deep, V8 Resonance: The increased diameter of the valves is the secret to the system’s signature deep tone, providing a rich rumble that smaller-diameter systems cannot match.
• Maximum Flow: After the x-pipe, the system steps up to 3.125”, ensuring that even high-horsepower, forced-induction, and large-displacement builds have the breathing room they need to perform.

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The Jekyll & Hyde Acoustic Profile

This system offers a true dual-personality experience:

• Valves Open: Experience near straight-pipe volume and an uncompromising exhaust note that lets the LS or LS7 engine truly sing.
• Valves Closed: When closed, the exhaust gases are routed through an innovative center muffler designed to significantly reduce volume and eliminate interior drone, making early morning departures or long highway hauls incredibly comfortable.

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Lightweight Performance & Construction

Weight reduction is a core pillar of the Concept 841 philosophy. The Full Titanium version of this system weighs less than half of the factory OEM NPP assembly, removing significant mass from the very rear of the vehicle to improve your power-to-weight ratio.

Available Configurations:

• Full Titanium System: Optimized for the Z06 and ZR1.
• Stainless Over-Axle / Titanium Muffler & Tips: A perfect hybrid for 2005–2008 and 2009–2013 Base and Grand Sport models, as well as Z06/ZR1.

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Precision Aesthetics

The Ultimate NPP V2 is finished with four commanding 4.5-inch tips that provide a custom, flush-fit appearance in the rear fascia cutouts.

• Brushed Titanium: Provides a classic, exotic high-performance look.
• Black PVD Coated Titanium: A durable, high-gloss finish for a more aggressive, modern aesthetic.

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Fitment & Compatibility

The Ultimate NPP V2 can be specified for any and all C6 models, including:

• C6 Base (2005–2008)
• C6 Base (2009–2013)
• C6 Grand Sport (2010–2013)
• C6 Z06 (2006–2013)
• C6 ZR1 (2009–2013)

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