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Best Auto Repair, Helena

1339 11th Ave Helena, MT 59601

406-442-7253
Opening Hours
  • Mon 8:00AM - 5:00PM
  • Tue 8:00AM - 5:00PM
  • Wed 8:00AM - 5:00PM
  • Thu 8:00AM - 5:00PM
  • Fri 8:00AM - 5:00PM
  • Sat 9:00AM - 1:00PM
  • Sun Closed
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406-442-7253 | 1339 11th Ave

Carbureted & EFI For Increasing Performance

Carbureted & EFI For Increasing Performance, Helena, MT

Carbureted & EFI For Increasing Performance

High-Performance EFI Auto Repair in Helena

The expert mechanics at Guaranteed Muffler know switching to fuel injection often improves the fuel efficiency and performance of older carbureted engines. In newer cars, replacing a single fuel injector with a multi-port fuel injector creates an intense, even flow of fuel on each cylinder when your engine needs it most. Feed your engine the fuel it needs with fuel pumps, fuel filters, superchargers, and turbochargers. Break out of gasoline only feed engines by adding a nitrous kit or cooling methanol injection kit.

To ensure the correct air to fuel ratio, Guaranteed Muffler can add a new stock-height replacement intake manifold, cold air intake, and fuel rails. Never run rich or lean with a hood scoop, high-performance air filter, and new O2 sensor. Call Guaranteed Muffler and talk to us about increasing your car's performance. When you want performance you need the auto repair experts at Guaranteed Muffler located at 1339 11th Ave.

If you're ready to take your car or truck's fuel injection to the next level, Guaranteed Muffler is ready with injectors, manifolds, fuel rails, sensors, and complete performance EFI conversion kits. From BMW to Audi to Corvette, Guaranteed Muffler has you covered.

Tuning Old School Carburetors For True Muscle

Your muscle car may be starving for air! Bring it to Guaranteed Muffler and find out. Because of operating losses in the intake runner and cylinder with newer unleaded fuels that do not fully vaporize in the combustion chamber, cars tuned to the manufacturer's specifications can run lean. Guaranteed Muffler can diagnose if you are actually running leaner than the manufacturer suggested ratio of 14.7:1 air to fuel mixture. Bring your classic car to Guaranteed Muffler at 1339 11th Ave to tune the perfect air to fuel mixture and correct ignition spark for maximum power.

Need to replace your old four-barrel carburetors or hack your hood with tunnel rams? Guaranteed Muffler will help you choose the Holley, Edelbrock, Barry Grant, or Quick Fuel carburetor and air intake system that is right for your car. Call us today at 406-442-7253!

  • ASE (Automotive Service Excellence)
  • CARQUEST
  • TECH-NET
  • World Pac
  • BBB (Better Business Bureau)
  • Car Care Aware

Testimonials

They installed a new muffler in my old Subaru earlier this week. They called me to discuss and gave me a quote (only 99 dollars, including installation!) before beginning work and had my car done exactly when they said they would, which only took a couple of hours even though I did not need the repair done quickly. My car sounds great and I will definitely use them again.
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