Working Hours
  • Mon 8:00AM - 5:30PM
    Tue 8:00AM - 5:30PM
  • Wed 8:00AM - 5:30PM
    Thu 8:00AM - 5:30PM
  • Fri 8:00AM - 5:30PM
    Sat 8:00AM - 12:00PM
  • Sun Closed
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419-782-7827 | 1735 Spruce St

Exhaust

Exhaust, Defiance, OH

The Best Defiance Exhaust System & Muffler Repair Services

At Northwest Automotive LLC we know some drivers like a quiet exhaust system while others prefer a "the louder the better" approach. Either way, an unusual rattle when your car is running is a signal that it is time for an immediate inspection of your exhaust system.

Quiet Exhaust and Muffler Services

Come to Northwest Automotive LLC and keep your exhaust system running smoothly. At Northwest Automotive LLC we know you count on your exhaust system and muffler to reduce noise and normalize your engine's back-pressure. When your exhaust system is faulty it can be very loud, but more importantly, it can impact your engine performance. Whatever the problem, we can repair it and get you back on the road quickly. Come by Northwest Automotive LLC today at 1735 Spruce St.

  • Catalytic Converter Replacement: Your catalytic converter is the most expensive part of your exhaust system. When your catalytic converter begins to fail, you will hear a very loud rattling noise or your "check engine light" will begin to flash. Come by Northwest Automotive LLC at 1735 Spruce St and we will diagnose the problem right away.
  • O2 Sensor Replacement: Ask any mechanic at Northwest Automotive LLC and they will tell you to have your O2 sensor inspected regularly. Oxygen sensors work in conjunction with your catalytic converter to monitor the amount of oxygen in your car's exhaust system. Your O2 sensor determines if your air to fuel ratio is balanced in real-time as you accelerate or idle. It helps your engine controller adjust the flow of fuel to maintain optimum oxygen to fuel mixture.

High-Performance Header Upgrades

While exhaust manifolds and headers play a similar role, at Northwest Automotive LLC we know they are miles apart on performance. Headers are upgrade parts designed for performance applications, while exhaust manifolds come standard. Both move exhaust away from the cylinder head to the exhaust pipe. Most noticeably, headers and its companion gaskets and wider exhaust pipe are much louder than a traditional manifold. But more importantly, the header improves exhaust system performance.

Exhaust manifolds are frequently formed of cast iron. The cast iron construction of your manifold keeps exhaust from being cleared as efficiently as possible. Headers solve this problem as they are made of individual steel tubes that connect to each cylinder. Header tubes all connect to a single collector pipe. The tubes have a smooth interior that keeps gases flowing evenly to prevent engine back-pressure. If you want the performance of a header but the sound is a problem, talk to our mechanics at Northwest Automotive LLC about an electric exhaust cutout. They are simple to install and allow you to open your exhaust without crawling under your car.

Get The Look Of Custom Exhaust Tubing & Tips

Straight, U, J, and S exhaust tubing are made with a smooth stainless steel or mild steel aluminized metal interior for maximum exhaust flow. At Northwest Automotive LLC exhaust tubing can be configured for a custom exhaust system. Stainless steel exhaust tubing looks sharp and adds longevity to your exhaust system. Complete the look with stylish exhaust tips. Nothing finishes an exhaust pipe better than the crisp clean appearance of a polished stainless steel exhaust pipe tip.

Loud Exhaust and Muffler Services

X-pipe and H-pipes synchronize the balance of the exhaust pulses from each cylinder based on firing order to increase efficiency. Many high-performance car owners like the deeper rumbling sound of H-pipes. If you own a street rod, Lake Pipes and Side Pipes route exhaust along or beside the bottom of your car body offering both increased performance, vintage look, and an aggressive sound. When it comes to trucks and diesel, consider smoke stack exhaust pipes to improve engine efficiency, pulling power and performance.

NAPA Service Assistant


What Our Customers Are Saying

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Highly recommend for any engine work or under the hood repairs!! Also I was in and out in 20 minutes today for an oil change!

, 02/03/2020

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Early Saturday morning, we were heading home to Minnesota and our car started making grinding noises. Called Tim and he said bring it in. Discovered we needed a new air conditioner compressor and he installed it and had us back on the road right away. It was a 12 hour drive home and we felt happy, cool and comfortable. Thanks Tim!

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Extremely trustworthy and knowledgeable, with fair rates. Absolutely recommend this shop! You won't be disappointed.

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My family has always gone to Northwest Automotive. We enjoy their great work, great deals, and friendly staff. I needed an alternator on an emergency. The shop owner found me an alternator after hours and willingly installed it to get us back on the road at a reasonable price. Always my first choice when recommending professional automotive repair.

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Thanks so much for making our car safe, and doing it for an afforadable price.

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Great service!

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The guys here are awesome! The fuel pump in my 99 Firebird went bad. They had my car towed to their place, diagnosed the problem, and had the fuel pump and the serpentine belt fixed within a few days. Will be recommending this place to all my family and friends!

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My daughter's car was making a horrible clacking noise from the engine. I trailered it to Northwest Automotive, and they took one listen and knew it was mechanical in nature. The worked really hard to quote a good price, find a used engine, and even offered to arrange financing. We chose not to repair the car at this time, and they didn't charge us for the effort they put in. I would definitely recommend these guys for any auto repair need.

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My experience at Northwest Automotive has always been good. They have always gotten me in quickly and fixed whatever I needed for a reasonable price! I would definitely recommend doing business there. Specializing in engine repairs and all your other needs!

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Our van's check engine light came on Friday evening. We planned to leave Sunday after church for vacation. So, Saturday morning I call up Northwest Automotive to see if they could fit me in. They said come on in. When I arrived, they ran the standard diagnostic test to find what tripped the light. It turned out to be an extremely simple fix, and they had me back on the road in 10 minutes, which was fantastic because I had two toddlers in tow. The best part? They charged me nothing! At dealerships, I've paid $50+ for them just to run this test.

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Great service and great guys that know what they're doing. And, they get it done fast and right!

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Awesome work! These guys know automobiles and have all the professional tools to do any job, big or small. Take your vehicle in or give them a call. OUTSTANDING WORK!

  • AERA (Automotive Engine Rebuilders Association)
  • ASE Certified - Automotive Service Excellence
  • BBB Accredited Business
  • NAPA AutoCare Center
  • Jasper Engines & Transmissions
  • Mobile Air Conditioning Society
  • WIX Filters
  • ALL-DATA
  • IDENTIFIX
  • UNOH Alumni - University of Northwestern Ohio
  • Defiance Ohio Police
  • Car Care Aware
  • Call Us For Service: 419-782-7827