{"product_id":"throttle-body-spacer-for-chevrolet-silverado-2003-2007-4-8l-5-3l-6-0l-8-1l","title":"Throttle Body Spacer for Chevrolet Silverado (2003-2007) 4.8L 5.3L 6.0L 8.1L","description":"\u003ch2\u003eBillet Throttle Body Spacer for 2003-2007 Chevrolet Silverado\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eOptimizes intake plenum velocity:\u003c\/strong\u003e Lengthens the intake tract between the throttle body and intake manifold to sharpen throttle response and recover off-idle torque on GMT800 trucks.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Silverado Intake Plenum Restriction\u003c\/h3\u003e\n\u003cp\u003eFactory GM Gen III Vortec and 8.1L Vortec intake manifolds feature abrupt transitions at the throttle blade flange. In stock trim, sudden throttle tip-in induces high-velocity air shear and turbulent boundary layers right at the manifold entry. This turbulence disrupts uniform air column velocity into the runner tracts, creating noticeable low-rpm lag under load and dulling initial throttle response, especially when towing or hauling heavy payloads.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003ePrecision CNC-machined from aircraft-grade 6061-T6 billet aluminum, this spacer increases plenum volume and stabilizes incoming airflow before it hits manifold runners. The open-bore, helical-profile design acts as a velocity transition duct, smoothing boundary-layer shear and accelerating charge velocity directly off idle. Finished with hard anodizing for galvanic corrosion resistance and paired with Grade 304 stainless steel hardware, it provides a rigid, leak-proof seal that resists manifold heat-soak without degrading.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px;\"\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e2003-2007 Chevrolet Silverado 1500 \/ 2500 \/ 3500 (Classic)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eEngine \/ Chassis\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eGen III Vortec (LR4, LM7, L59, LQ4, LQ9) \u0026amp; Vortec 8100 (L18) \/ GMT800\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eStock Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e270-340 hp \/ 285-455 lb-ft (Engine Dependent)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2003-2007 Chevrolet Silverado 1500 (4.8L V8 LR4, 5.3L V8 LM7 \/ L59 \/ LM4 \/ L33, 6.0L V8 LQ9)\u003c\/li\u003e\n  \u003cli\u003e2003-2007 Chevrolet Silverado 2500 \/ 2500 HD (6.0L V8 LQ4, 8.1L V8 L18)\u003c\/li\u003e\n  \u003cli\u003e2003-2007 Chevrolet Silverado 3500 (6.0L V8 LQ4, 8.1L V8 L18)\u003c\/li\u003e\n  \u003cli\u003eFits 2007 Silverado \"Classic\" body style models equipped with 3-bolt\/4-bolt OEM throttle configurations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eThe Chevrolet Towing Caliber\u003c\/h3\u003e\n\u003cp\u003eBuilt for the harsh duty cycles of heavy-duty towing and rugged payload hauling, this CNC 6061-T6 hardware upgrade withstands severe thermal expansion cycles without cracking or leaking vacuum. It provides dependable low-end throttle linearity when pulling trailers up steep grades.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50498885779704,"sku":"DS-EN01T5ISA","price":63.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/throttle-body-spacer-for-chevrolet-silverado-2003-2007-4-8l-5-3l-6-0l-8-1l-1.jpg?v=1789274767","url":"https:\/\/performancechiptuning.com\/products\/throttle-body-spacer-for-chevrolet-silverado-2003-2007-4-8l-5-3l-6-0l-8-1l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}