2022 Subaru WRX Rear Under Diffuser

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INSTALLATION MANUAL STI REAR UNDER DIFFUSER Genuine part number: E5610VC110, E5610VC120 Applicable model: WRX (VB), 2022 MY and later Precautions 1. Be sure to observe the content in CAUTION for installation described in the main text during the work. Neglecting it may cause coming-off or peeling-off of the part, and also may prevent the vehicle from functioning. 2. Before the installation, turn the ignition switch to OFF, and apply the parking brake without fail. 3. Do not use thinner or the like, otherwise the surface of the STI rear under diffuser may be corroded. Also, keep the part away from fire, otherwise it may be deformed. 4. When performing an air blow after the installation of the part, keep the nozzle 300 mm or more away from the part. If it is too close, the surface of the part may be peeled off. This manual describes how to install and handle the STI rear under diffuser. Before installing the part, please be sure to read this manual for proper installation. Tools to be used Gloves, Scale, Awl, Torque wrench, Phillips screwdriver, Hole saw (20 mm), Ratchet wrenches (8 mm, 10 mm), Drill bits (3 mm, 6 mm, 9.5 mm), Nippers, File, Fabric adhesive tape, Masking tape, Scissors, Safety goggles, Ratchet wrench extension (50 mm) No. STI rear under diffuser Bolt A Bolt B Well nut Spring nut Washer A Washer B Template Instruction Manual (this document) Components Part name Qty. Available in website * Bottom view of ① * The grid lines seen on the bottom surface of the rear under diffuser are made in the production process and not abnormal. Also, they do not affect driving performance. Small bag WARNING sink, and use rigid racks or the like to support the vehicle without fail. 1 7 2 7 2 2 2 1 1 Rr LH RH UP Rr LH RH UP Completion image 1. Preparation for installation Installation procedure (1) Cut the template ⑧ to make the center, RH, and LH templates. (2) On the bottom surface of the vehicle rear bumper, attach the center template ⑧, RH template ⑧, and LH template ⑧, aligning with the radius ends. (Fig. 1) (1 location each at center, RH, and LH, 3 locations in total) (3) Mark scribe lines with an awl or the like at the center of each hole position on the center template ⑧, RH template ⑧, and LH template ⑧. (2 locations at center and 1 location each on RH and LH, 4 locations in total) (4) Remove the center template ⑧, RH template ⑧, and LH template ⑧. (5) Mark scribe lines with an awl or the like at the marking positions on the rear bumper. (Fig. 2) (2 locations each on RH and LH, 4 locations in total) Fig. 1 Fig. 2 CAUTION Do not mark any scribe line at positions indicated with ◎. (Same for RH) ① Rear under diffuser Rear bumper Rear bumper Rear bumper Rear bumper ⑧ LH template ⑧ LH template ⑧ Center template ⑧ Center template Masking tape Masking tape Masking tape Masking tape Awl Awl Scribe lines Enlarged view of templates ⑧ attachment portions Enlarged view of LH template (same for RH) Align with radius end. Align with radius end. Enlarged view of center template Rr LH RH UP Rr LH RH UP 3mm Rr LH RH UP Fig. 3 Fig. 4 Fig. 5 (6) Turn the rear fog light socket counterclockwise to remove it, and set aside the harness so that the hole-making work will not be hindered. (Fig. 3) (7) Drill holes at the positions where the scribe lines are marked in Sections 1. (3) and 1. (5). Referring to the figure on the left, make prepared holes first, and then final holes. (Fig. 4) (3→6→9.5 mm: 1 location at center) (3→Hole saw 20 mm: 1 location at center) (3→6→9.5 mm: 3 locations each on RH and LH, 6 locations in total) (8) After making a 20 mm hole in Section 1. (7), cut out the rear bumper with nippers as shown in the enlarged view of the portion B. (Fig. 4) (9) Remove burrs around the opened holes completely with a file or the like. (10) Restore the rear fog light socket removed in Section 1. (6). (11) Insert the well nuts ④ to the holes made on the bottom side of the rear bumper in Section 1. (7). (Fig. 5) (1 location at center and 3 locations each on RH and LH, 7 locations in total) CAUTION CAUTION CAUTION CAUTION When making holes, wear safety goggles. Before the work, make a stopper with fabric adhesive tape to a position approximately 5 mm away from the tip of the drill bit to prevent interference with the drill. When making a hole at the portion A, a harness is present on the back of the rear bumper. Be careful not to damage it. Drill bit Fabric adhesive tape Do not make any hole at positions indicated with ◎. (Same for RH) Rear bumper Rear bumper Rear bumper Rear bumper ④ Well nuts Turn counterclockwise to remove. Rear fog light socket Drill Drill Drill Hole saw Enlarged view of portion B 20 mm hole Cutting out rear bumper Rr LH RH DOWN Rr LH RH UP Ft UP Rr LH RH UP Rr LH RH UP Fig. 6 Fig. 7 Fig. 8 Fig. 9 (1) Place the rear under diffuser ① on the bottom side of the rear bumper, and temporarily fix them with the bolts A ② in the order of 1, 2, and 3. (Fig. 8) (1 location each at center, RH, and LH, 3 locations in total) (2) Align the holes of the rear bumper and the rear under diffuser ①, and temporarily fix them with the bolts A ② in the order of 4, 5, 6, and 7. (Fig. 9) (2 locations each on RH and LH, 4 locations in total) (12) Insert the spring nut ⑤ to the panel inside the rear bumper. (Fig. 6) (1 location each on RH and LH, 2 locations in total) (13) Peel off the backing paper of the washer A ⑥, and attach the washer to the portion E of the rear under diffuser ①, aligning the holes. (Fig. 7) (1 location each on RH and LH, 2 locations in total) 2. Installation work of rear under diffuser ① Rear under diffuser ① Rear under diffuser ① Rear under diffuser ① Rear under diffuser Rear bumper Rear bumper Rear bumper Rear bumper Panel Panel ⑤ Spring nut ⑤ Spring nut Insert it so as to contact corner radius. Backing paper ⑥ Washer A ② Bolts A ② Bolts A Sectional view of C-C Insert. Misaligned-Not accepted Enlarged view of portion E ⑥ Washer A Align hole positions. Sectional view of F-F Accepted Rr LH RH UP Ft UP Rr LH RH UP Fig. 11 Fig. 10 (3) After inserting the bolt B ③ to the washer B ⑦, align the holes of the rear bumper and the rear under diffuser ①, and temporarily fix them in the order of 8 and 9. (Fig. 10) (1 location each on RH and LH, 2 locations in total) (4) Finally tighten the bolts A ② temporarily tightened in Sections 2. (1) and 2. (2) in the order of 1, 2, 3, 4, 5, 6, and 7. (Fig. 11) (1 location at center and 3 locations each on RH and LH, 7 locations in total) (5) Finally tighten the bolts B ③ temporarily tightened in Section 2. (3) in the order of 8 and 9. (Fig. 11) (1 location each on RH and LH, 2 locations in total) Tightening torque for reference: 5.0 N•m (0.5 kgf•m) (6) Finally, check for lifting or tilting of the installation portion and missing and omission of tightening of any bolt. The installation work has been completed. Content Date Revision history Newly created July 16, 2021 CAUTION At the final tightening, use an extension (50 mm) to prevent the torque wrench from contacting the product. ① Rear under diffuser ① Rear under diffuser ① Rear under diffuser Rear bumper Rear bumper Rear bumper ⑤ Spring nut ⑥ Washer A ⑦ Washers B ⑦ Washer B ③ Bolts B ③ Bolt B Extension Extension (50 mm) Torque wrench Torque wrench Panel Sectional view of G-G

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