Professional Awesome 2008-14 Subaru Impreza/WRX STI Third Gen Quick Release Splitter Support System

Jump to a Section Vehicle Fitment How the System Works Choose Your Configuration What Is Included Installation and Inspection Important Support Requirement Quick-Release Splitter Support for 2008–2014 Subaru Impreza, WRX, and STI (third generation) This chassis-specific system removes much of the fabrication normally required to mount our quick-release latches to the car. Once the vehicle-side mounts and splitter-side receivers are installed and aligned, the splitter can be removed and reinstalled without tools for normal operation. Guide both receiver pins into the latches, confirm that both latches are fully engaged, and the splitter is secured. Pull the release levers directly or connect customer-designed cables or pull rods when remote access is preferred. The Cliff Notes Chassis-specific vehicle mounting hardware reduces fabrication and avoids drilling on the tested application. Regular and Large receivers provide different packaging, ground-clearance, and load-distribution options. Choose receiver mounting hardware for the splitter material and finished blade thickness. Optional spreader plates distribute receiver loads over more of the splitter blade. At least one additional rigid support is required to prevent the splitter from rotating around the receiver pins. Vehicle Fitment and Chassis Mounting The included left and right adapter mounts attach without drilling on the tested 2008–2014 Subaru Impreza, WRX, and STI. Short aluminum latch mounts provide vertical adjustment. Other years have not been confirmed, so fitment outside the listed range should not be assumed. No-drill fitment refers to attaching the supplied mounts to the tested chassis. Splitter blades, bumper covers, undertrays, ducting, and other vehicle modifications vary, so trimming or additional installation work may still be required to route the mounts and align the complete splitter system. How the System Works Install the vehicle-specific chassis mounts. Use the supplied hardware and structural mounting locations described for this application. Attach and adjust the left and right latches. Position them so the receiver pins enter cleanly and the planned splitter height is maintained. Attach the receivers to the splitter blade. Select receiver hardware that suits the blade material and thickness. Install a separate rigid support. The receiver pins allow rotation, so the completed splitter needs another support system that controls movement in both directions. Test both latches before driving. Confirm full engagement, free release-lever movement, and adequate clearance through the complete suspension and bodywork range. Choose Your Configuration 1. Receiver Size Receiver Approximate dimensions When to choose it Regular 6-inch base; pin center about 2 inches above the splitter The best choice for most cars and tighter bumper packaging. Large 12-inch base; pin center about 4 inches above the splitter Moves the latch higher for more clearance with the splitter removed and spreads load over a wider footprint, but requires more space. 2. Spreader Plates Spreader plates are available only with Regular receivers. One plate is supplied for each receiver. They distribute load over a larger blade area and can help with thinner, more flexible, or lower-strength splitter materials. Each plate adds 3mm to the receiver mounting stack, so subtract 3mm from the maximum blade thickness listed below. Spreader-plate configurations use 16 receiver mounting positions unless No Receiver Mounting Hardware is selected. They are optional; blade material, stiffness, receiver loads, and the rest of the support system should guide the choice. 3. Receiver Mounting Hardware Choose the receiver-to-splitter hardware based on the splitter material and finished blade thickness. Elevator bolts are intended primarily for wood-based blades, where the wide flat head and square shank can seat slightly into the material and resist turning. The 40mm flat screws with black aluminum washers are better suited to aluminum, carbon fiber, composites, and other materials that should not accept a square shank. Hardware Recommended application Maximum blade thickness With 3mm spreader plates 30mm Elevator Bolts Wood-based splitter blades 14mm 11mm 35mm Elevator Bolts Wood-based splitter blades 19mm 16mm 40mm Flat Screws + Aluminum Washers Aluminum, carbon fiber, composites, and other non-wood blades 16mm 13mm Choose No Receiver Mounting Hardware when supplying specialized fasteners or using hardware already on hand. This removes only the receiver-to-splitter fasteners, washers, and matching nuts; all vehicle-side hardware and latch-to-mount hardware remain included. What Is Included 2 Short aluminum latch mounts Left and right 2008–2014 Subaru chassis adapter mounts 8 M8 x 1.25 x 18mm JIS screws for the vehicle-specific mounting assembly 2 quick-release latches, one left and one right 2 splitter receivers in the selected size, each with a stainless steel pin M6 x 1.00 hardware for attaching the latches to the adjustable mounts The selected receiver mounting hardware for 4 positions with Regular receivers, 8 with Large receivers, or 16 with Regular receivers and spreader plates. Elevator-bolt and flat-screw choices include matching M8 nyloc nuts; flat-screw choices also include black aluminum washers. If selected, 2 spreader plates Release cables, pull rods, remote handles, and their brackets are not included because access and routing vary by vehicle and build. Installation and Inspection Dry-fit the vehicle-side mounts, latches, splitter, and receivers before drilling the splitter blade. Align both receiver pins so they enter the latches without binding and both latches close positively. Install at least one separate rigid support and confirm the splitter cannot rotate in either direction around the receiver pins. Verify that release levers, cables or pull rods, bodywork, and nearby components cannot interfere or release unintentionally. Perform a nut-and-bolt check before and after every event and inspect the complete system after any splitter impact or off-track excursion. Correct looseness, deformation, cracking, interference, incomplete engagement, or heavily worn parts before returning the car to the track. Individual latches, receivers, spreader plates, hardware, mounts, and support-rod components are available in our Splitter Mount and Support Rod Spare Parts category. Important Support Requirement The receiver pins allow the splitter to rotate relative to the latches. At least one additional rigid mounting system is required to control that rotation in both directions. We highly recommend our Splitter Support Rods, but a properly designed custom mount or another manufacturer’s rigid support can also perform this job. The latch manufacturer rates each latch to resist opening under loads upwards of 700 lb. This is a latch rating, not a load rating for the completed splitter installation. Finished capacity depends on the chassis mounting points, fasteners, splitter material, support geometry, installation quality, aerodynamic load, and track impacts.