In-House Builds

Porsche 911 / 964 / 993 LS3 Conversions

LS conversions for classic and air-cooled era 911 platforms—engineered mounts, cooling, and driveline solutions built in our shop.

We Specialize in Porsche 911, 964 & 993 LS3 Conversions

The Porsche 911 lineage—from air-cooled 964 through the 993 generation—represents some of the most rewarding chassis for an LS conversion when engineering is done correctly. At Chavis Performance & Engineering (CPE), we focus on Porsche 911 LS conversion projects that respect the car’s balance, serviceability, and your performance goals.

Whether you own a weekend driver, a track-focused build, or a collector-quality 911, our in-house team plans each 964 LS swap or 993 LS swap around real-world packaging: engine position, header clearance, cooling capacity, and driveline choice. We work with owners who want a single shop to execute the full conversion, as well as those who later supplement with Porsche LS conversion parts for maintenance or upgrades.

Based in Baltimore, Maryland, we welcome 911 owners nationwide. If you are comparing a classic 911 LS conversion to staying with the original flat-six, we help you understand tradeoffs in power, reliability, and long-term ownership—then execute the path you choose with precision fabrication and professional installation.

Professional Porsche 911 LS3 Conversion Services

End-to-end services for 964 and 993 chassis—from first consultation through road-ready delivery. Every subsystem is engineered for the 911’s rear-engine layout and your driving style.

Complete LS3 Engine Swap

Full replacement of the factory flat-six with a GM LS3—planned for your 964 or 993’s weight distribution, firewall clearance, and long-term service access.

Headers, Exhaust & Cooling

Custom routing for classic 911 engine bays: heat management, oiling, and exhaust flow designed around track and street duty.

Transmission & Manual Options

Pair your LS 911 with manual or automatic solutions; we also support Porsche manual conversions alongside engine work.

Wiring, ECU & Calibration

Integrated harnesses and tuning so your LS 911 starts, idles, and performs reliably in all conditions.

Ongoing Service & Upgrades

After delivery, count on CPE for service and performance upgrades on LS-swapped chassis.

The Process

How We Work

Consultation & Planning

We review your 964 or 993 chassis, goals, and budget. Packaging and weight balance differ from water-cooled cars—your plan reflects that.

Engine & Driveline

LS3 power paired with transmission options suited to the 911 layout and your driving style.

Custom Fabrication

Mounts, headers, oil systems, and cooling tailored to 911 engine bay and rear weight distribution.

Installation & Integration

Professional in-house install with wiring, fuel, and calibration support.

Validation

Testing and road verification before delivery.

Reasons To Choose Chavis Performance & Engineering

Owners trust CPE for 911 LS projects because we combine platform-specific engineering with honest project planning and U.S.-built parts where they matter most.

Dedicated Porsche LS focus—not a generic speed shop bolting in crate motors without chassis-specific engineering.
In-house fabrication and conversion systems developed for 911 packaging constraints, including 964 and 993 generations.
Transparent scope: turnkey builds in our Baltimore-area facility or phased projects with clearly defined milestones.
U.S.-manufactured CPE components where they improve fit, durability, and repeatability on your build.
Direct access to the same team that designs DIY conversion parts shipped nationwide.
Experience across air-cooled 964 and water-cooled 993 layouts—each presents distinct cooling and structural considerations.
Support for owners who travel to our shop from across the country for specialized 911 LS work.
Alignment with full Porsche LS conversion methodology used on 996, 997, and Boxster/Cayman platforms.

Exploring other generations? See our in-house programs for 986 Boxster, 987 Cayman, and 996 / 997—or read our FAQ for common LS conversion questions.