South Beloit's Trusted Exhaust Shop

Your Car Deserves a Sound It's Proud Of

From rattling mufflers to full custom builds — we get your ride running smooth, sounding right, and looking sharp. Honest work at fair prices, every time.

Call (608) 290-7316 See Our Services
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What We Do

Exhaust & Performance Services

Whatever your ride needs — from a quick muffler swap to a full custom exhaust system — we've got the skills and parts to get it done right.

Custom Exhaust Systems

Built from the ground up for your vehicle. We design and fabricate exhaust systems that match your style, sound, and performance goals.

Muffler & Exhaust Repair

Rattling, roaring, or just louder than it should be? We'll diagnose the issue and get your exhaust back to factory-smooth or better.

Catalytic Converter Service

Replacement, inspection, and compliance. We carry quality converters for domestic and import vehicles — fast turnarounds included.

Performance Upgrades

Cold air intakes, downpipes, turbo back systems, and more. Unlock hidden horsepower and give your engine the breathing room it deserves.

Diesel & Heavy Duty

Diesel pickups, trailers, and commercial vehicles — we handle the bigger rigs with the same care and attention as your daily driver.

General Auto Repair

Brakes, suspension, and other mechanical work while you're in the bay. One stop for your exhaust and whatever else your truck needs.

Why Choose Us

Not Your Average Muffler Shop

We've been serving South Beloit and the surrounding area for years because we treat every vehicle like it's our own. No upselling, no surprises — just solid work and a handshake you can count on.

Honest Pricing, No Hidden Fees

We give you a clear quote upfront. What we say is what you pay — no late-night surprise charges.

Quality Parts, Built to Last

We source from trusted manufacturers so your exhaust holds up through mud, salt, and miles of Wisconsin roads.

Fast Turnaround, Every Time

Most jobs are done the same day. We know your time matters, and we respect it.

Locally Owned & Operated

We're right here in South Beloit. This is our community, and we take pride in keeping our neighbors' rides running right.

Custom exhaust work in progress at Fat Guy Customs & Exhaust

10+

Years Serving
South Beloit

Testimonials

What Our Customers Say

Don't take our word for it — hear from the folks who trust us with their rides.

"Brought my truck in for a rattling muffler and walked out with a custom dual-tip setup I didn't even know I wanted. Guy was straight-up about what I needed and didn't try to upsell me on anything. Will keep coming back."

M

Mike R.

South Beloit, WI

"I've been bringing my diesels here for years. They know what they're doing, the pricing is fair, and they always get it right the first time. That's rare to find these days."

J

Jason T.

Belvidere, IL

"Got a custom exhaust for my '06 diesel and it sounds absolutely amazing. The team was patient with all my questions and made the whole process easy. Highly recommend to anyone in the area!"

S

Sarah K.

Roscoe, IL

Ready to Upgrade Your Ride?

Swing by the shop or give us a call. We'll walk you through your options and get you back on the road fast.

Call (608) 290-7316 Email Us

Get in Touch

Come See Us at the Shop

We're conveniently located right off the main road in South Beloit. Pull in anytime during business hours — we're always happy to chat about your project.

Address

301 Charles St
South Beloit, WI 61080-1978

Business Hours

Monday – Friday 8:00 AM – 5:00 PM
Saturday 8:00 AM – 1:00 PM
Sunday Closed

Send Us a Message

Tell us about your ride and what you need. We'll get back to you as soon as we can.

Is this your business?This is my business