{"title":"Texas Speed GM LS Short Blocks","description":"\u003cp\u003eTexas Speed LS short blocks for custom engine builds. Verify cylinder heads, reluctor and ECU compatibility, oiling, accessories and installation clearance. These are not complete ready-to-run engines or guaranteed direct-fit replacements.\u003c\/p\u003e","products":[{"product_id":"texas-speed-performance-388-cid-dart-ls-next-iron-short-block","title":"Texas Speed \u0026 Performance 388 CID Dart LS Next Iron Short Block","description":"\u003cp\u003eStart your high-output LS build with the Texas Speed \u0026amp; Performance 388 CID Dart LS Next iron short block. Its six-bolt main-cap configuration, forged pistons and 4340 steel rods provide a foundation rated by the supplier to handle up to 1,200 HP with appropriate supporting components and tuning. This rating describes build capacity, not guaranteed engine output.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e388 cubic-inch displacement\u003c\/li\u003e\n\u003cli\u003eDart LS Next iron block with six-bolt main-cap configuration\u003c\/li\u003e\n\u003cli\u003eTSP\/K1 58x crankshaft with 3.622-inch stroke\u003c\/li\u003e\n\u003cli\u003eTSP\/Wiseco 4.125-inch forged pistons, -1cc volume, with upgraded wrist pins\u003c\/li\u003e\n\u003cli\u003eTSP 4340 forged steel 6.125-inch I-beam connecting rods\u003c\/li\u003e\n\u003cli\u003eARP main stud kit\u003c\/li\u003e\n\u003cli\u003eManufacturer part number: TSP-DART3881200HP-1-STD-Kit\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThis short block is an engine-build foundation, not a complete ready-to-run engine or a guaranteed direct-fit replacement. Verify cylinder-head compatibility, 58x electronics, installation clearance and all supporting components for your application. Vehicle collection membership does not imply compatibility with every stock LS configuration.\u003c\/p\u003e","brand":"Texas Speed \u0026 Performance","offers":[{"title":"Default Title","offer_id":48610232565921,"sku":"TSP-DART3881200HP-1-STD-Kit","price":9999.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0759\/9905\/1937\/files\/texas-speed-performance-uam-388-ci-dart-ls-next-iron-short-block-tsp-dart3881200hp-1-std-kit.U68875-AM_VOff_01.webp?v=1793665152"},{"product_id":"texas-speed-performance-427-cid-dart-ls-next-iron-short-block-13cc-pistons","title":"Texas Speed \u0026 Performance 427 CID Dart LS Next Iron Short Block -13cc Pistons","description":"\u003cp\u003eBuild your high-output LS combination around the Texas Speed \u0026amp; Performance 427 CID Dart LS Next iron short block with -13cc pistons. Its six-bolt block configuration and forged rotating assembly provide a foundation rated by the supplier to handle up to 1,200 HP with appropriate supporting components and tuning. This is build capacity, not guaranteed engine output.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDart LS Next iron block with six-bolt main-cap configuration\u003c\/li\u003e\n\u003cli\u003eTSP 58x forged crankshaft with 4.00-inch stroke\u003c\/li\u003e\n\u003cli\u003eTSP\/Wiseco 4.125-inch forged pistons with -13cc dish and upgraded wrist pins\u003c\/li\u003e\n\u003cli\u003eTSP 4340 steel 6.125-inch I-beam connecting rods\u003c\/li\u003e\n\u003cli\u003eARP main stud kit\u003c\/li\u003e\n\u003cli\u003eUpgraded 1\/2-inch head studs included\u003c\/li\u003e\n\u003cli\u003eManufacturer part number: TSP-DART4271200HP-13-STD\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThis listing is for the -13cc piston configuration. It is a short block, not a complete ready-to-run engine. Verify cylinder heads, head-stud compatibility, 58x electronics, installation clearance and supporting components for your build. Collection membership does not imply direct-fit compatibility with every stock LS vehicle.\u003c\/p\u003e","brand":"Texas Speed \u0026 Performance","offers":[{"title":"Default Title","offer_id":48610290466977,"sku":"TSP-DART4271200HP-13-STD","price":9999.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0759\/9905\/1937\/files\/texas-speed-performance-uam-427-ci-dart-ls-next-iron-short-block-tsp-dart4271200hp-13-std.U68882-AM_VOff_01.webp?v=1793665334"},{"product_id":"texas-speed-performance-427-cid-dart-ls-next-iron-short-block-4cc-pistons","title":"Texas Speed \u0026 Performance 427 CID Dart LS Next Iron Short Block -4cc Pistons","description":"\u003cp\u003eBuild your LS combination on the Texas Speed \u0026amp; Performance 427 CID Dart LS Next iron short block with -4cc pistons. A six-bolt block configuration, forged pistons and 4340 steel rods provide a foundation rated by the supplier to handle up to 1,200 HP with appropriate supporting components and tuning. This describes build capacity, not guaranteed engine output.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e427 cubic-inch displacement\u003c\/li\u003e\n\u003cli\u003eDart LS Next iron block with six-bolt configuration\u003c\/li\u003e\n\u003cli\u003eTSP 58x crankshaft with 4.00-inch stroke\u003c\/li\u003e\n\u003cli\u003eTSP\/Wiseco 4.125-inch forged pistons with -4cc volume and upgraded wrist pins\u003c\/li\u003e\n\u003cli\u003eTSP 4340 steel 6.125-inch I-beam connecting rods\u003c\/li\u003e\n\u003cli\u003eARP main stud kit\u003c\/li\u003e\n\u003cli\u003eUpgraded 1\/2-inch head studs included\u003c\/li\u003e\n\u003cli\u003eManufacturer part number: TSP-DART4271200HP-4-STD\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThis listing is specifically for the -4cc piston configuration. It is a short block, not a complete ready-to-run engine. Verify cylinder heads, head-stud compatibility, 58x electronics, installation clearance and supporting components for your build. Collection membership does not imply direct-fit compatibility with every stock LS vehicle.\u003c\/p\u003e","brand":"Texas Speed \u0026 Performance","offers":[{"title":"Default Title","offer_id":48610327724193,"sku":"TSP-DART4271200HP-4-STD","price":9999.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0759\/9905\/1937\/files\/texas-speed-performance-uam-427-ci-dart-ls-next-iron-short-block-tsp-dart4271200hp-4-std.U68883-AM_VOff_01.jpg?v=1793665494"},{"product_id":"texas-speed-performance-332-cid-gen-3-iron-ruthless-runt-ls-short-block","title":"Texas Speed \u0026 Performance 332 CID Gen 3 Iron Ruthless Runt LS Short Block","description":"\u003cp\u003eBuild a compact, high-output LS combination with the Texas Speed \u0026amp; Performance Iron Ruthless Runt short block. This Gen 3 listing pairs an iron-block foundation with forged pistons, forged H-beam rods and ARP main studs. The supplier rates the assembly to support up to 1,000 HP with appropriate supporting components and tuning, not as guaranteed engine output.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e332 cubic-inch displacement, marketed in the 5.3L engine family\u003c\/li\u003e\n\u003cli\u003eGM iron 5.3L block foundation\u003c\/li\u003e\n\u003cli\u003eGM 3.622-inch nodular-iron crankshaft with six-bolt flange\u003c\/li\u003e\n\u003cli\u003eTSP\/Wiseco forged 3.820-inch pistons with -4cc dish and no valve reliefs\u003c\/li\u003e\n\u003cli\u003eTSP forged 4340 steel 6.125-inch H-beam connecting rods\u003c\/li\u003e\n\u003cli\u003eARP main stud kit\u003c\/li\u003e\n\u003cli\u003eFor naturally aspirated or boosted builds\u003c\/li\u003e\n\u003cli\u003eManufacturer part number: TSP-332IR-GEN3-STD\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThis is a short block, not a complete ready-to-run engine or a guaranteed direct-fit replacement. The linked product is labeled Gen 3, while the general source specifications cover both Gen III\/IV blocks and 24x\/58x reluctor configurations. Confirm the supplied block generation, reluctor and sensor configuration before ordering. Check cylinder-head and piston-to-valve clearance, electronics and supporting components for your specific build. Collection membership does not establish direct-fit compatibility with every listed vehicle.\u003c\/p\u003e","brand":"Texas Speed \u0026 Performance","offers":[{"title":"Default Title","offer_id":48610421276833,"sku":"TSP-332IR-GEN3-STD","price":6109.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0759\/9905\/1937\/files\/texas-speed-performance-uam-53l-332-ci-gen-3-iron-ruthless-runt-short-block-tsp-332ir-gen3-std.U68885-AM_VOn_01.webp?v=1793665728"},{"product_id":"texas-speed-performance-332-cid-gen-4-iron-ruthless-runt-ls-short-block","title":"Texas Speed \u0026 Performance 332 CID Gen 4 Iron Ruthless Runt LS Short Block","description":"\u003cp\u003eBuild your naturally aspirated or boosted LS combination around the Texas Speed \u0026amp; Performance Gen 4 Iron Ruthless Runt short block. Forged dished pistons, forged H-beam rods and ARP main studs reinforce its iron-block foundation. The supplier rates the assembly to handle up to 1,000 HP with suitable supporting components and tuning; this is build capacity, not guaranteed engine output.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e332 cubic-inch displacement, marketed in the 5.3L engine family\u003c\/li\u003e\n\u003cli\u003eGM Gen IV iron 5.3L block configuration\u003c\/li\u003e\n\u003cli\u003eGM 3.622-inch nodular-iron crankshaft with six-bolt flange\u003c\/li\u003e\n\u003cli\u003e58x reluctor for the Gen IV configuration, as specified by Texas Speed\u003c\/li\u003e\n\u003cli\u003eTSP\/Wiseco forged 3.820-inch pistons with -4cc dish and no valve reliefs\u003c\/li\u003e\n\u003cli\u003eTSP forged 4340 steel 6.125-inch H-beam connecting rods\u003c\/li\u003e\n\u003cli\u003eARP main stud kit\u003c\/li\u003e\n\u003cli\u003eManufacturer part number: TSP-332IR-STD\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThis listing is for the Gen 4 iron version, not the Gen 3 or aluminum-block version. It is a short block, not a complete ready-to-run engine or a guaranteed direct-fit replacement. Confirm the supplied block and sensor configuration, cylinder-head compatibility and piston-to-valve clearance for your build. A 24x-equipped vehicle requires an appropriate electronics conversion when using the 58x configuration. Collection membership does not imply direct-fit compatibility with every listed vehicle.\u003c\/p\u003e","brand":"Texas Speed \u0026 Performance","offers":[{"title":"Default Title","offer_id":48610524528801,"sku":"TSP-332IR-STD","price":6109.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0759\/9905\/1937\/files\/texas-speed-performance-uam-53l-332-ci-gen-4-iron-ruthless-runt-short-block-tsp-332ir-std.U68886-AM_VOn_01.webp?v=1793665890"}],"url":"https:\/\/www.davescustomparts.com\/collections\/texas-speed-gm-ls-short-blocks.oembed","provider":"Dave's Custom Parts","version":"1.0","type":"link"}