Work / RENNSPORT
Shopify · Custom theme and fitmentRENNSPORT: parts that fit, for the car you drive
A custom Shopify store for RENNSPORT, a performance shop selling parts, flash tunes and dyno sessions. Customers tell the store which car they drive, and every page shows them what fits it.
- Client
- RENNSPORT, Los Angeles, USA
- Platform
- Shopify
- Scope
- Custom theme, vehicle fitment, catalogue and service pages
- Date
- October 2026
1Predictive search2Your car, saved3Fitment-first promise4Search by car, part number or brand5Four-step finder
- Predictive searchResults appear while typing, across products, part numbers, brands and car models. Press / to jump straight in.
- Your car, saved“Add your vehicle” becomes My Garage, shown in the header on every page.
- A fitment-first promiseThe headline says what makes the store different before anything else: parts that fit.
- Three ways to find a partBy vehicle, by part number or SKU, or by brand, from one panel.
- Four-step finderYear, make, model, engine. 1,303 vehicles, and each step only offers real options.
Performance parts only sell when they fit. RENNSPORT's customers had to work out compatibility themselves, and wrong orders meant returns.
We built the store around one idea: ask for the car first, then shop for that car. The design is black and white with a single signal yellow, and it gives the shop's high-value services, Shark Flash phone tuning and dyno sessions, their own place next to the parts.
Four quick steps, then the store shops for your car
Year, make, model and engine. Each step only offers options that exist for the choices before it, so nobody can pick an impossible car. The vehicle is saved to My Garage and stays in the header on every page.
Every product says whether it fits
With a car saved, collection pages tell customers how many parts in the list fit it and can filter down to just those. Matching products carry a green “Fits your 3 Series” badge, and each product page checks the fit before anything goes in the cart.
Find it fast, buy it without leaving the page
Search shows results while you type, across product names, part numbers, brands and car models. Adding to cart opens a side drawer with a free-shipping progress bar, so customers keep shopping without a page change.
Tuning and dyno time, sold next to the parts
Shark Flash 2.0, the phone-based flash tuner, gets its own dark feature section on the homepage: three simple steps and a phone showing the power gain. Tunes and dyno sessions have their own pages with clear packages and prices.
Built for shopping on a phone
The finder stacks into one thumb-friendly column, the header keeps the saved car in reach, and the cart opens as a full-height panel. Tested on a 390px screen.
More than one way into the catalogue
Not everyone starts with a year and engine. Makes and Brands pages show how many parts each make has and which manufacturers the shop stocks, with a jump to the finder from both.
Standard Shopify underneath
The fitment system runs on Shopify's own data tools, so the shop team can manage vehicles and products from the normal Shopify admin. No custom platform, no lock-in.
| Feature | Shopify building block |
|---|---|
| Vehicle data: years, makes, models, engines | Metaobjects (a “Vehicle” entry for each of the 1,303 vehicles) |
| Which vehicles a product fits | Product metafields linked to vehicles |
| “Show only parts that fit” on collections | Shopify Search & Discovery filters |
| Vehicle finder, My Garage, fitment badges and checks | Custom theme sections (Liquid and JavaScript) |
| Predictive search | Shopify's built-in Predictive Search |
| Cart drawer and free-shipping bar | Shopify cart with a custom drawer |
| Shop Pay instalments and fast checkout | Shopify Payments accelerated checkout |
| Editable homepage and service pages | Shopify theme editor, no code needed |
Black and white, with one signal colour
Near black and warm off-white, with yellow saved for the actions that matter, like “Show parts that fit”, and green used only to say a part fits.
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