Porsche LS3 Conversions
Turnkey in-house LS3 builds and complete DIY conversion components. We support full shop installs and builders who want precision-engineered kits.
Explore LS3 Conversions →
Baltimore, MD · Porsche LS Specialists
Transform Your Porsche With CPE
Chavis Performance & Engineering builds and supports Porsche LS3 conversions, manual swaps, service, and U.S.-made conversion parts.
It’s not a conversion, it’s a solution.
LS + Porsche
Conversions & Parts
DIY + In-House
Builds & Kits
U.S.A.
CPE Parts Built Here
What We Offer
Our Services
From complete LS3 conversions to maintenance, manuals, aero, and parts—everything we do is focused on Porsche performance.
Porsche Manual Conversions
Convert your Porsche from automatic to manual or upgrade your gearbox with engineered adapters, fabrication, and expert installation.
Manual Conversions →
Custom Porsche Aero Kits
Custom aerodynamic upgrades—from splitters and wings to full widebody packages—installed with attention to fit, finish, and performance.
Aero Kits →
Porsche LS3 Conversion Parts
LS3 swap kits, mounts, harnesses, and components built and sourced to our standards. All CPE Parts Are Made in the U.S.A.
Shop Conversion Parts →Education
What Is a Porsche LS3 Conversion?
A Porsche LS conversion replaces the factory engine with a GM LS3 V8. At CPE, we engineer every swap so the LS3 fits your Porsche’s chassis, cooling, and driveline while improving power, reliability, and serviceability.
Many owners choose an LS swap after dealing with known weaknesses or high rebuild costs on certain original Porsche engines, or simply because they want modern torque, sound, and tuning potential without giving up the Porsche chassis they love.
At CPE, we design and build conversion systems so your car performs on the street and track—whether we install it in our Baltimore-area shop or you assemble it from our DIY components.
Benefits
Why Convert to an LS3?
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Significantly increased horsepower
The LS3 delivers far more output than many factory Porsche engines, with room to grow through cam, intake, exhaust, and tuning.
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Improved reliability
Owners often move to LS3 power after repeated issues with certain original engines—the LS3 is proven in street and track use.
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Easier maintenance
Parts availability, familiar service procedures, and widespread technician knowledge make long-term ownership more straightforward.
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Strong aftermarket support
From exhaust to ECU tuning, the LS3 ecosystem offers more options than most legacy Porsche powerplants.
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Overall performance
Better torque, modern drivability, and tunability add up to a driving experience many owners prefer for daily and track use.
Chassis We Support
Supported Porsche Platforms
Porsche 911 (964 / 993)
LS3 conversions, service, and parts solutions for air-cooled and early water-cooled 911 platforms.
911 / 964 / 993 →
Porsche 986 Boxster
Full LS3 swap support, maintenance, and conversion components for the first-generation Boxster chassis.
986 Boxster →
Porsche 987 Cayman
LS3 conversions, service, and engineered parts for Cayman and Boxster 987 models.
987 Cayman & Boxster →
Porsche 996 / 997
Our core focus: 996 and 997 LS3 packages, in-house builds, DIY kits, and ongoing service.
996 / 997 →Why Porsche Owners Choose CPE
Engineering-first builds, transparent options for DIYers, and parts manufactured in the United States.
- Deep specialization in Porsche LS3 conversions—not a general shop bolt-on program.
- Both complete in-house builds and DIY conversion solutions from the same engineering team.
- Precision engineering and fabrication tailored to Porsche chassis and packaging.
- All CPE Parts Are Made in the U.S.A.
- A focus on performance, reliability, and craftsmanship in every project.
Featured Build
Featured LS3 Conversion Package
Our Porsche 996 / 997 LS3 package centers on a 495 horsepower LS3, professional in-house installation, and a comprehensive conversion system—mounts, cooling, exhaust integration, wiring, and calibration support tailored to your chassis.
Starting at $40,000. Final pricing depends on chassis condition, parts selection, transmission choice, and project scope. We’ll quote your build after consultation.
Contact UsLS3 builds
Our Recent Builds
Our Story
About Chavis Performance & Engineering
Chavis Performance & Engineering was founded by Tyler Chavis after years of hands-on work with Porsche platforms and the GM LS3. The company was built to deliver reliable LS3 conversion solutions—born from seeing repeated failures and frustration with certain factory powerplants.
Over time, the shop earned a reputation in the Porsche community for high-quality LS3 conversions and engineered solutions—from complete in-house builds to precision parts for DIY installers. Today we’re based in Baltimore, Maryland, supporting owners nationwide.
More About CPEReady to Transform Your Porsche?
Whether you want a full LS conversion built in our shop or conversion parts for your own garage, we’re here to help. Call, email, or send a message—we’ll talk through your goals and next steps.