Greeley, CO Auto Repair Shop & Auto Mechanic for Car Repair, Radiator Repair & Muffler Repair
Specializing in custom performance exhaust systems, brake repair, A/C service, coolant flushes, suspension, and oil changes in Greeley, CO.
From original factory exhaust replacements to high-flow dual performance headers and custom welds — we get your vehicle sounding and running right.
Google Reviews & Shop Location
Serving Greeley and Weld County since 1967. Rated highly for custom exhaust fabrication, brake service, and honest advice.
Our Featured Exhaust & Service Projects
Real photos from our shop bays at 2601 W 10th St showing precision welds, custom pipe fabrication, and heavy-duty exhaust installs.
Precision MIG/TIG Exhaust Weld
Clean hand welds and pre-made mandrel pipe sections fitted directly in our Greeley shop bay.
Full Undercarriage Exhaust System
Full system replacement with custom high-flow mufflers and heavy-duty hanger brackets.
Performance Muffler & Tip Fitting
Custom stainless performance mufflers fitted for maximum exhaust flow and optimal sound profile.
Catalytic Converter & Pipe Replacement
Direct-fit catalytic converter and exhaust pipe replacement ensuring clean emissions and leak-free operation.
Custom Pipe Bending & Hanger Welding
Hand-bent exhaust piping custom contoured and securely mounted with heavy-duty steel hangers.
Truck Undercarriage Lift & Diagnostic
In-bay lift inspection for exhaust rust leaks, broken flanges, and worn-out hangers.
Pre-made Mandrel Pipe Section Installation
Custom quad exhaust tip setup and precise undercarriage piping fitted for a Pontiac GTO.
Undercarriage Exhaust Alignment
Professional undercarriage alignment ensuring heat clearance, zero rattle, and leak-free joints.
Dual Exhaust Tip Fabrication & Polish
Custom welded exhaust tips aligned flush with bumper and polished for a clean finish.
Custom Dual Exhaust Fabrication
Full custom dual exhaust system fabricated from the header-back on a lifted 4×4 truck — heavy-duty piping, high-flow muffler, and chrome tips.
Classic El Camino Exhaust & Suspension
Full exhaust inspection and alignment on this restored El Camino — checking undercarriage clearance, hanger integrity, and tip positioning.
Lifted Truck Undercarriage Inspection
In-bay lift diagnostic for rust evaluation, flange condition, and custom exhaust routing on a lifted heavy-duty pickup.
Classic Coupe Full System Replacement
Complete undercarriage exhaust replacement on a restored classic — hand-fitted pipes with period-correct muffler and polished tips.
Vintage Pickup Custom Exhaust Build
Custom exhaust fabrication from the manifold back on a fully restored vintage truck — mandrel sections, hidden hangers, and dual chrome tips.
Classic Fleetline Exhaust Alignment
Precision exhaust alignment and tip fitting on a pristine red classic — ensuring proper heat clearance and showroom-quality finish.
Corvette Z06 Exhaust Inspection
Full undercarriage exhaust evaluation on a C6 Corvette — checking header clearance, muffler condition, and tip alignment for peak performance.
Classic Muscle Car Exhaust Service
Complete exhaust system inspection and alignment on a restored Chevelle — verifying hanger integrity, pipe routing, and period-correct sound profile.
Classic Coupe Engine & Undercarriage Work
In-shop engine bay and undercarriage service on a blue G-body classic — exhaust manifold inspection, pipe fitment, and custom tip selection.
Vintage Pickup Dual Tip Install
Polished stainless dual exhaust tips flush-mounted on a restored silver pickup — custom exit angle and show-quality weld finish.
Tri-Five Chevy Lift Inspection
Full lift diagnostic on a stunning black Tri-Five classic — evaluating exhaust system integrity, frame rust, and preparing for custom fabrication.
Classic V8 Engine Bay Service
Detailed engine bay work featuring polished aluminum intake, chrome dress-up, and custom blue silicone hoses — full undercarriage exhaust tie-in.
Studebaker Lark Exhaust & Inspection
Full exhaust evaluation on this rare coral-painted Studebaker compact — checking pipe routing, muffler condition, and preparing for custom tip fabrication.
Red Classic Coupe Lift Diagnostic
In-bay lift inspection for this pristine red classic — evaluating complete undercarriage condition, exhaust integrity, and planning custom system fabrication.
Collins Muffler & Service — Shop Front
Our full-service auto repair shop at 2601 W 10th Street — open Tuesday through Saturday for all your exhaust, brake, and automotive service needs.
Dual Tip Undercarriage Fabrication
Flush-mounted polished stainless dual exhaust tips welded and aligned on the lift — show-quality finish with precise bumper clearance.
Vintage Sedan Restoration & Inspection
Full shop evaluation on a rare pre-war vintage sedan — assessing frame condition, undercarriage integrity, and planning period-correct exhaust fabrication.
Jeep Wrangler Custom Exhaust Setup
Custom off-road exhaust system on a heavily modified Jeep — routing around suspension components, high-clearance design, and aggressive tip exit.
Classic Mopar Undercarriage Service
Complete undercarriage inspection and exhaust alignment on this pristine green Mopar classic — checking pipe fitment, hanger condition, and factory-correct tip positioning.
Custom Lowrider Exhaust Fabrication
Show-quality custom exhaust on a fully customized blue lowrider with candy paint and pinstriping — hidden hangers, flush tips, and mirror-polished finish.
Polished Chrome Dual Tip Install
Close-up of premium chrome dual-wall exhaust tips professionally installed — precision welds, perfect alignment, and show-car polish quality.
Catalytic Converter Undercarriage Service
Direct-fit catalytic converter replacement on a truck undercarriage — ensuring clean emissions compliance and leak-free operation after installation.
Winter Undercarriage Exhaust Inspection
Cold-weather lift inspection evaluating exhaust system integrity, rust from road salt exposure, and hanger condition on a full-size pickup.
Classic Red El Camino Full Service
Complete automotive service on this stunning red classic — including exhaust evaluation, brake inspection, and undercarriage assessment for show-ready condition.
Classic V8 Engine Bay & Exhaust Tie-In
Engine bay service on a pristine red classic featuring a detailed small-block V8 — with full undercarriage exhaust system tie-in and manifold inspection.
Custom Side Exit Exhaust Tip Mount
Flush-mounted polished stainless side exit tip professionally welded and aligned on a lifted white truck — clean body-side clearance and show-quality finish.
Classic Porsche 911 Engine & Exhaust Service
Rear-engine bay service on a classic air-cooled 911 — inspecting heat exchangers, exhaust header condition, and planning custom muffler upgrade for that signature flat-six sound.
Dedicated Automotive Exhaust & Service Specialties
From pre-made mandrel exhaust pipe sections to brake rotor turning and A/C service, our Greeley bay handles it all with quality craftsmanship and master welding.
Custom Exhaust Fabrication & Welding
Have a custom build, classic hot rod, or lifted truck requiring precision exhaust piping? Collins Muffler sources pre-made mandrel-bent pipe sections and hand-welds them into exhaust systems engineered for tone, clearance, and performance.
Protect Your Vehicle From Catalytic Converter Theft
Catalytic converter thefts occur in under 2 minutes. Protect your exhaust system with laser-cut heavy aluminum security plates installed directly on our Greeley lift bay.
Authorized Installer of World-Class Exhaust & Performance Brands
Frequently Asked Exhaust & Service Questions
Get clear, honest answers from our 57-year local shop technicians before visiting 2601 W 10th St.
Weld County & Northern Colorado Service Area
Drivers choose Collins Muffler & Service because we provide master custom exhaust welds and honest repairs that surrounding dealerships and national chains can't match.
Contact Collins Muffler & Service
Have questions about exhaust customization, catalytic converter replacements, or brake repair? Drop us a line or visit our shop bay on 10th Street.
Shop Address
2601 W 10th Street
Greeley, CO 80634
Hours of Operation
Tuesday – Saturday: 9:30 AM – 5:00 PM
Sunday & Monday: Closed