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Your order Product Subtotal Magnuson Direct Injection Radix Supercharger System - 2014+ GMC Sierra, Chevrolet Silverado L83 5.3L V8 - 01-19-53-182-BL × 1 $5,436.00 Doug Thorley Headers THY-515-LS-C × 1 $574.53 Hooker Competition Headers 2455HKR × 1 $230.90 2017 Mercury 6HP 6MLH Outboard Motor × 1 $502.00 Summit Racing™ Metallic-Ceramic Coated Headers SUM-G9140 × 1 $326.65 King XP-Series Main Bearings MB557XP × 1 $63.99 JBA Performance Exhaust Competition-Ready Headers 6966S × 1 $592.87 Doug's Headers D368 × 1 $569.15 Hedman Elite Extreme-Duty Headers 89278 × 1 $527.84 Schoenfeld Headers 1302LS1-C × 1 $645.14 Mahle Original Head Bolt Kits GS33285 × 1 $24.99 Summit Racing™ Metallic-Ceramic Coated Headers SUM-G9120 × 1 $328.94 Manley Race Series Stainless Steel Valves 11360-8 × 1 $159.99 Hedman Elite Extreme-Duty Headers 88308 × 1 $489.59 Subtotal $10,472.58 Shipping Flat rate: $20.00 Total $10,492.58 🔒 Secure Checkout — Your payment is encrypted and secure. 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