2601 W 10th St, Greeley, CO 80634Tue - Sat: 9:30 AM - 5:00 PM
    Established 1967 • 57+ Years in Greeley
    Back to Johnstown, CO Service Hub
    Home/Johnstown, CO/Custom Exhaust & Performance
    Serving Johnstown, CO (80534) — 15.4 miles (20–24 mins)Fastest Route: via US-34 E to W 10th St
    Johnstown Dedicated Service Hub
    Performed at 2601 W 10th St, Greeley, CO 80634

    Custom Exhaust & Performance for Johnstown, CO

    Flowmaster, MagnaFlow, Mandrel Bends & Dual Pipes

    Johnstown commuters taking US-34 rely on Collins Muffler & Service for fast turnarounds on check engine light diagnostics (P0420/P0421 codes), catalytic converter theft replacements, and full brake overhauls. Collins Muffler & Service provides local Johnstown drivers with master precision custom exhaust & performance right down the road in Greeley.

    Master Shop Quality
    Custom & OEM Expertise

    Includes precision fitment, quality parts & master weld guarantee.

    57-Year Local Warranty

    We stand behind all catalytic converter installations, custom dual exhaust welds, and brake services.

    What's Included in Our Custom Exhaust & Performance Service:

    Flowmaster, MagnaFlow, Borla mufflersPerformed on site using professional lift bays and hydraulic bending machinery.
    Mandrel-bent stainless dual pipingPerformed on site using professional lift bays and hydraulic bending machinery.
    Custom headers & cat-back systemsPerformed on site using professional lift bays and hydraulic bending machinery.
    Polished chrome & matte black tipsPerformed on site using professional lift bays and hydraulic bending machinery.

    Serving Vehicle Owners Across Weld County

    In addition to central Greeley, we regularly welcome drivers from Evans, Eaton, Windsor, La Salle, Milliken, Johnstown, and Kersey for specialized exhaust fabrication and brake service.