Vehicle Performance Modification in Chatsworth, CA
Performance Upgrades
Golden Coast Customs brings professional-grade ECU tuning, intake, and exhaust upgrades to Chatsworth and the greater Los Angeles area — built to unlock real, measurable power gains.
ECU Tuning
Cold Air Intake
Exhaust Systems
Performance Bundles
Free Estimate
Bundle Option
Stack the Mods, Maximize the Build
Combine upgrades into a bundled performance package for better value and a more complete driving transformation.
Performance Package Bundle
Our most popular combination — an ECU tune and cold air intake deliver compound gains that neither mod achieves alone. Add an exhaust system to complete the trifecta of power, sound, and efficiency.
ECU Tune — Stage 1 performance map
Cold Air Intake — improved airflow
Exhaust Upgrade — deeper tone Optional
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Pricing Varies by Vehicle All pricing depends on make, model, and year. Contact us for an accurate quote for your specific build.
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Additional Components Some vehicles may require supporting mods or additional labor. We'll assess and advise before any work begins.
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Professional Installation All upgrades are performed by experienced technicians for safe, optimal results every time.
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Warranty & Compatibility Warranty and compatibility vary by brand and system. We'll help you choose the right fit for your vehicle.
Package 1
Most Popular Performance Package
ECU Tuning / Stage 1 Performance
Our ECU tuning service rewrites your factory engine map to unlock horsepower, improve throttle response, and optimize fuel and boost delivery — safely and reliably. Ideal for European and performance platforms.
Starting $400 - Call for custom pricing
Increased horsepower and torque output
Improved throttle response
Optimized fuel and boost mapping
Safe, reliable software tuning process
Compatible with most European and performance vehicles
Pairs perfectly with intake upgrades for stacked gains
Typical Power Gains
20 – 100+ HP depending on platform
Package 2
Stage 1 Mod
Cold Air Intake Installation
Improve airflow, boost that intake growl, and give your engine bay a sportier look — all in a single bolt-on upgrade. Cold air intakes are a foundational mod that compound well with ECU tuning.
Starting Price $300+ - Call for custom pricing
Improved airflow and engine efficiency
Enhanced turbo and intake sound character
Sportier engine bay appearance
Quick installation with minimal downtime
Works great when paired with ECU tuning for stacked results
Package 3
Sound + Flow
Exhaust System Upgrades
Axle-back or cat-back — we source and install exhaust systems that give your vehicle a deeper, more aggressive tone while improving exhaust flow and overall performance feel.
Starting Price $700+ - Call for custom pricing
Deeper, more aggressive exhaust tone
Improved exhaust flow and back-pressure reduction
Custom tip finishes available
Bolt-on systems available for most vehicles
Axle-back and cat-back options available
Pricing varies widely by system and vehicle — contact us for a quote
Performance Upgrade Shop Near Chatsworth, CA & Los Angeles
Looking for a performance shop near Chatsworth, CA? Golden Coast Customs specializes in real, dyno-proven upgrades for enthusiasts across the San Fernando Valley and greater Los Angeles. From Stage 1 ECU tunes on European platforms to cat-back exhaust installs on domestic performance cars, we handle the full spectrum of bolt-on and software modifications.
Our shop is conveniently located to serve Chatsworth, Northridge, Canoga Park, West Hills, Woodland Hills, and surrounding LA communities. Whether you're building a track car, a daily driver with more personality, or a weekend cruiser that sounds the part — Golden Coast Customs is your vehicle modification shop near Los Angeles.
Every upgrade is paired with a full consultation, professional installation, and honest guidance on what will and won't work for your specific vehicle. No guesswork. No upsells. Just results.
Golden Coast Customs • Chatsworth, CA • Serving Greater Los Angeles