Modesto’s Premier High-Performance Engine Building & Tuning Hub
Precision Performance Engineering for the Central Valley’s Elite Builds
At Flawless Industries, we specialize in high-horsepower setups and professional engine building for drivers who demand unrivaled results. We provide the Central Valley with dealer-level diagnostics and custom performance solutions, from reliable OEM refreshes to specialized 950+ WHP Subaru long-block builds. Our team utilizes the latest in-house technology to deliver “no-guesswork” performance for clients in Modesto, Turlock, and the surrounding Tri-County area. Whether you are building a dedicated track machine or a high-output daily driver, we ensure every clearance is measured to a flawless standard and every component is selected for maximum reliability.
Precision Engine Building & Custom Performance Systems New
We offer expert engine rebuilding services, ranging from factory-spec replacements to high-horsepower custom setups. All specialized machining is performed by trusted local shops that meet our rigorous standards for both OEM and big-power applications. We have extensive experience with Subaru EJ, FA, FB, and EG platforms, as well as LS swaps and high-performance imports. From designing custom turbo systems start-to-finish to installing standalone ECU swaps, we handle every technical detail to ensure your build is ready for the street or the track.
Hardware
- Big Turbo & Induction: Installation of big turbo kits, intercooler upgrades, and custom turbo systems built from start to finish.
- High-Output Fueling: Full fueling system upgrades, including high-flow pumps, injectors, and specialized flex fuel kits.
- Advanced Electronics: Standalone ECU swaps, base map setups for in-house builds, and ECU reflashes for select exotic and European vehicles.
Tuning Policy
- Specialized Collaboration: We explicitly state: “No In-House Dyno Tuning.”
- Elite Partners: We work closely with industry-leading tuners for specific platforms, including Snail Performance (Subaru), Daft Tuning (V8), and Admin Tuning (350Z/370Z).
Partner Links
- Snail Performance: Specialized Subaru calibration and remote support.
- Daft Tuning: Performance V8 platform experts.
- Admin Tuning: High-performance VQ-series specialists.
Motorsports
- Suspension & Handling: Professional installation of coilovers, air ride systems, angle kits, and custom alignment specs for drift or track use.
- Competition Equipment: Installation of safety systems, including fire suppression, roll bars, harnesses, and racing seats.
- Track & Drift Prep: Full vehicle preparation for SCCA, NASA, or drift competition compliance.
The Tri-County Destination for Motorsports & Custom Builds New
Located in the heart of Modesto, we are the premier destination for performance enthusiasts across Stanislaus, San Joaquin, and Merced Counties. We take pride in serving our local car community with transparent, high-quality workmanship on every large-scale project. Starting in 2026, all custom builds and large performance packages will be billed hourly with weekly updates, ensuring full transparency and meticulous attention to detail as we bring your vision to life.