Stainless Works NVLS3S LS1 Catback Dual Exhaust System with X-Pipe & Chambered Turbo Mufflers

The Stainless Works NVLS3S is a complete 3-inch cat-back exhaust system engineered for LS1-swapped 1962–1967 Chevy II Nova builds. Constructed entirely from 304 stainless steel and fully TIG welded, this system delivers exceptional corrosion resistance, long-term durability, and an aggressive dual exhaust tone.

Every tube in the system is CNC mandrel bent to maintain full interior diameter throughout each curve, eliminating flow restrictions and maximizing exhaust scavenging. The system routes exhaust gases from the headers through a balanced X-pipe crossover, then into a pair of dual chambered turbo-style mufflers, and out through over-axle tailpipes that exit behind the rear tire — tucked cleanly between the quarter panel and leaf spring.

Key Features:

• Full 3-inch diameter 304 stainless steel construction throughout
• CNC mandrel-bent tubing for unrestricted exhaust flow
• Balanced X-pipe crossover for improved scavenging and sound
• Dual chambered turbo-style mufflers for an aggressive exhaust note
• Over-axle tailpipes exit between quarter panel and leaf spring
• Mill finish exterior with all TIG welded joints
• All required clamps and hangers included for installation
• Designed to mate with Stainless Works LS1 headers with 3-inch slip-fit collectors (P/N NVLS1)
• Proudly manufactured in the USA
• Backed by a Stainless Works limited lifetime warranty on materials and craftsmanship

This is a Performance Connect system, meaning it is designed to connect to other Stainless Works performance components rather than stock factory connection points. Companion headers (P/N NVLS1) are sold separately.