Pick the tone.
We build it.
35 years of cutting, bending, and welding exhaust in Hawthorne. Custom mufflers, cat-back systems, catalytic converter replacement, and leak repair. Hear it before we weld it.
Four tones, your choice
Stock+
OE replacement tone, slight deepening. Daily-driver friendly. HOA-approved.
Mellow
A grown-up V8 burble. Quiet at cruise, present under throttle.
Aggressive
Chambered or straight-through with a real bark. Track day energy.
Race
Minimal restriction, maximum sound. Off-road or weekend cars.
What we build
Custom muffler installation
Magnaflow, Flowmaster, Borla, Vibrant, MBRP, and OE-style. Bench-tested for tone before install.
Cat-back & axle-back systems
Bolt-on kits and full custom builds in aluminized or T-304 stainless.
Catalytic converter replacement
CARB EO-certified cats only. Properly clocked, new gaskets and hardware.
Pipe fabrication
Mandrel-bent in-house. Stainless or aluminized, from 1.75" up to 4".
Flex pipe & manifold leaks
Smoke-tested, welded once. No exhaust putty, no clamp-on patches.
Resonator & X/H-pipe install
Tune drone out of a loud system without losing the bark.
Header & downpipe install
Long-tube, shorty, and aftermarket downpipes for turbo cars.
Diesel exhaust
5" turbo-back, DPF-back, and quiet performance options for trucks.
Aluminized vs stainless
Aluminized Steel
ValueCoated mild steel. Lasts 5–8 years in coastal CA before surface rust starts. Best value for daily drivers staying inland.
T-409 Stainless
BalancedMid-grade stainless. 10–15 year lifespan, will surface-rust but won't perforate. Common OE choice.
T-304 Stainless
PremiumPolished, fully corrosion-resistant. Lifetime in CA salt air. Best for show cars, coastal daily drivers, and 'install once' builds.
Titanium
RaceWeight savings for track cars. Special order — we'll TIG it in for you.
In-house TIG & MIG
Every weld done on our lift by an exhaust fabricator with 20+ years. No bolt-together kits faked as "custom."
When to come in
Loud rumble or rasp
Cracked weld, blown muffler baffle, or rusted pipe.
Check engine light
Failed O2 sensor or catalytic converter efficiency code (P0420/P0430).
Exhaust smell in cabin
Leak ahead of the cat — safety issue. Come in same day.
Failed smog inspection
Bad cats or O2 sensors. We diagnose and replace with CARB-legal parts.
Hanging or scraping
Broken exhaust hanger or isolator. Quick fix on the lift.
Power loss
Clogged cat or collapsed muffler restricting flow.
South Bay's muffler shop
Customers drive in from across LA for our custom exhaust work. We're 5 minutes off the 405 and 105.
Exhaust questions
How much does a custom exhaust cost?
A muffler-back system runs $350–$750 in aluminized steel and $650–$1,400 in T-304 stainless, fully installed and welded. Cat-back and header-back builds are quoted on the lift after we see the routing.
Can I hear my exhaust before you weld it?
Yes. We tack the muffler in place, fire the car up, and let you listen at idle and at throttle. If you don't love the tone, we swap it before any final welds — no second labor charge.
Do you sell CARB-compliant catalytic converters?
Yes — every cat we install in California is CARB Executive Order (EO) certified for your vehicle. Required for smog and registration. We won't install non-EO cats on CA-registered cars.
How long does an exhaust job take?
Muffler replacement: 1–2 hours. Cat-back system: 2–4 hours. Full custom build: usually same-day if dropped off in the morning.
Will a louder exhaust hurt my engine?
A properly designed system won't. Cheap straight-pipe builds can cost low-end torque. Our builds are sized for your engine's flow needs, not just for noise.
Do you fix exhaust leaks?
Yes. We smoke-test the system, find the leak (manifold gasket, flex pipe, cracked weld, rusted pipe), and weld it once. No clamp-on Band-Aids.
Ready to sound right?
Drop in or book online for a custom exhaust consultation. We'll mock it up, fire the car, and you decide before we weld.