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No, no drilling hole in trunk. To adjust the rears you need to lay on your back behind the rear wheels and reach up to the top of the strut where the upper spring mount is to turn the knob for adjustments. You do have to drill a small hole in the upper spring mount which bolts to the body so a short piece of cable attached to the shock adjuster with a knob on the end which is your rear shock adjuster. The instructions show exactly where (via measurements) the hole is drilled in the upper shock mount so the cable can pass thru. My XA's have been installed at least 6 or 7 years I believe, no issues.
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RJT 2SS/RS, AAM 3.70's, MTI Sway Bars, Shifter, SS brake lines ZLI calipers, rotors/pads BMR Trailing & Toe Arms, rear cradle/diff bushes, Pedders XA's, Camber/Toe eccentrics, Radius arm inserts, GTO clutch reservoir, LS9 cam, Comp valve springs, Melling 10296 oil pump, CR5 timing chain, LS6 damper, CAI Cold Air Intake, ARH LT headers, HF cats, GMPP axle back, Elite Eng Catch Can, Black ZL1 20x10 & 2011 whls 285/35/20 & 305/35/20 General G-Max RS, 2011 Convertible spoiler, 1LE front spoiler, Lloyd "SS" Floor Mats, GM Camaro Trunk Mat, wrapped console, hand brake lever, Grant steering whl.
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