![ASR 4 [Flat Face] vs ASR 4 [Open Face]: Smooth vs Slotted 4.5-Inch Rigs](/images/products/asr-4-open-face.webp)
In the 4.5-inch cockpit class, Advanced SimRacing gives buyers two versions at the exact same price: the ASR 4 Chassis [Flat Face] ($807.49 net) and the ASR 4 Chassis [Open Face] ($807.49 net). Applying code SIMRACINGNATION5 saves you $42.50 on either model.
Clean Outer Aesthetics vs All-Side T-Slots
The ASR 4 [Flat Face] seals the outer-facing aluminum walls so you see a smooth, uninterrupted matte black powder coat instead of open grooves. All inward-facing and top slots remain open for your seat brackets, pedal tray, and shifter arm.
The ASR 4 [Open Face] keeps traditional T-slots exposed on every side of the 4.5-inch by 1.5-inch extrusion. If you bolt custom button boxes, amplifiers, USB hubs, and D-BOX Haptic Brackets ($113.99 net) to the outside of your frame, those outer slots give you extra mounting tracks.
| Specification | ASR 4 [Flat Face] | ASR 4 [Open Face] |
|---|---|---|
| Profile Dimensions | 4.5" x 1.5" Smooth Outer Wall | 4.5" x 1.5" Full Multi-Slot |
| Direct Drive Rating | 25+ Nm Wheelbases | 25+ Nm Wheelbases |
| Exterior Look | Clean Monolithic Finish | Classic Industrial T-Slot |
| Net Price (Code SIMRACINGNATION5) | $807.49 ($849.99 MSRP) | $807.49 ($849.99 MSRP) |
Final Verdict
- Pick the ASR 4 [Flat Face] ($807.49 net): Best for 90% of builders who want a clean, modern look that wipes down easily.
- Pick the ASR 4 [Open Face] ($807.49 net): Best for heavy tinkerers who mount accessories across the outer walls of both uprights.
Save 5% on Advanced SimRacing Hardware
Use partner discount code SIMRACINGNATION5 at checkout to save 5% on all cockpits, racing seats, monitor stands, and mounts in the official Advanced SimRacing collection.