Build stories / DIY / Engineering

Notes from the workshop.

Build stories, install walkthroughs, and the engineering decisions behind the parts. Written by the people who designed them.

Weekly new posts In-house authored Open feedback

Find parts for your vehicle

Live · 100% fitment
Popular →

Notes from the workshop.

Build stories, install walkthroughs, and the engineering decisions behind the parts. Written by the people who designed them.

Featured · May 8, 2026 · 8 min read

Why we redesigned the FL5 front lip — and what V2 fixed.

V1 customers told us where they kissed the curb. Here's the engineering log: how we modeled the impact, where we added the flex zone, and how we tested 1,200 simulated curb strikes before tooling V2.

Read the post →

Tuning an F1 exhaust for the flat-plane LT6.

Bend angles, valve actuation, equal-length headers — how the C8 Z06 system found its voice.

GT3 forged wheel program: now in nine finishes.

What it took to add satin bronze, matte titanium, and brushed graphite to the line — and the QC checks behind each one.

WRX/STI front splitter install — under two hours, no drilling.

Step-by-step walkthrough with torque specs and the three places people get it wrong.

Build of the month: Pavel's Aventador SVJ.

Full F1 titanium, GT4 forged, color-matched aero. The build that finally tied our flagship parts together on one car.

What "100% fitment guarantee" actually means.

The OEM body scan, the bench-fit, the QC sheet — and what we do when a customer says it doesn't fit.

Civic Type R FL5 V2 lip install — 45-minute walkthrough.

Tools you need, tools you don't, and how to spot the right alignment line on the OEM bumper.

Inside our Baldwin Park CNC shop.

The 5-axis cells, the QC station, and the wall of customer Polaroids. A photo tour of where every AFD part is made.

R8 V10 F1 titanium system: now shipping.

Why it took 14 months. What the dyno numbers look like. What customers got first.

Why we publish downforce numbers on every aero spec sheet.

CFD setup, wind-tunnel validation, and how to read the curve from a real splitter test.

Inside the process

Notes from the workshop.

Build stories, install walkthroughs, engineering decisions.

Weeklyposts
In-houseauthored
Openfeedback