[{"id":170473980001,"handle":"all-products","updated_at":"2025-05-18T09:00:02-05:00","published_at":"2020-09-09T18:55:52-05:00","sort_order":"best-selling","template_suffix":"pf-e03b4526","published_scope":"global","title":"All The Parts","body_html":""},{"id":347630918,"handle":"best-selling-products","title":"Best Selling Products","updated_at":"2025-05-20T10:10:08-05:00","body_html":null,"published_at":"2016-10-02T12:22:59-05:00","sort_order":"best-selling","template_suffix":null,"disjunctive":true,"rules":[{"column":"title","relation":"contains","condition":"Best Selling"},{"column":"title","relation":"not_contains","condition":"Best Selling"}],"published_scope":"global"},{"id":239797797063,"handle":"black-label","updated_at":"2025-04-24T02:25:02-05:00","published_at":"2020-12-22T16:49:49-06:00","sort_order":"best-selling","template_suffix":"pf-cb6e825d","published_scope":"global","title":"Black Label","body_html":""},{"id":239860482247,"handle":"black-label-custom-built-engines","updated_at":"2025-02-28T12:56:57-06:00","published_at":"2020-12-23T13:23:06-06:00","sort_order":"manual","template_suffix":"engines-no-pricing","published_scope":"global","title":"Black Label - Custom Built Engines","body_html":""},{"id":241321836743,"handle":"black-label-long-blocks","updated_at":"2024-11-20T17:05:01-06:00","published_at":"2021-01-11T11:34:03-06:00","sort_order":"best-selling","template_suffix":"","published_scope":"global","title":"Black Label - Long Blocks","body_html":""},{"id":29758887,"handle":"long-blocks","updated_at":"2024-11-20T17:05:01-06:00","published_at":"2014-10-22T13:01:00-05:00","sort_order":"alpha-asc","template_suffix":"","published_scope":"web","title":"Long Blocks","body_html":"\u003cp\u003eHave an LS but want to upgrade the important parts? Our Long blocks are built using the best components available. \u003c\/p\u003e\n\u003cp\u003eLong Blocks include assembled short block, assembled cylinder head and all valvetrain components. They are ready for your covers, sensors, intake assembly and oil pan.\u003c\/p\u003e","image":{"created_at":"2019-10-17T13:51:21-05:00","alt":null,"width":2729,"height":2380,"src":"\/\/www.mastmotorsports.com\/cdn\/shop\/collections\/LS3_416_BL_Long_Block.png?v=1571338282"}},{"id":29758751,"handle":"ls-engines","updated_at":"2025-02-28T12:56:57-06:00","published_at":"2014-10-22T13:00:00-05:00","sort_order":"manual","template_suffix":"engines-no-pricing","published_scope":"global","title":"LS Engines","body_html":"\u003cp style=\"text-align: center;\"\u003eHandbuilt LS engines from Mast Motorsports. Complete your engine with front drives, engine controllers and everything in between.\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003eEngine lead times vary - please call \u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003e1-866-551-4916 for delivery estimate.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003ca href=\"https:\/\/airtable.com\/app1GO7hNT6zpA60j\/pagvNV3bFTNeJTxEO\/form\" rel=\"noopener\" target=\"_blank\"\u003eClick here to request a custom engine with our free engine quote questionaire.\u003c\/a\u003e\u003c\/strong\u003e\u003c\/p\u003e","image":{"created_at":"2019-07-17T19:59:16-05:00","alt":null,"width":1771,"height":2048,"src":"\/\/www.mastmotorsports.com\/cdn\/shop\/collections\/LS7_427_2.9L_5b220b5e-531f-4e78-ab93-e0c33003d409.png?v=1563411558"}},{"id":152865931361,"handle":"all-engines","updated_at":"2025-02-28T12:55:40-06:00","published_at":"2019-10-17T10:47:43-05:00","sort_order":"manual","template_suffix":"engines-no-pricing","published_scope":"global","title":"Products - Engines","body_html":"\u003cp style=\"text-align: center;\"\u003eEngine pricing \u0026amp; lead times vary - please call \u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003e1-866-551-4916 for pricing \u0026amp; delivery estimate.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003ca href=\"https:\/\/airtable.com\/app1GO7hNT6zpA60j\/pagvNV3bFTNeJTxEO\/form\" rel=\"noopener\" target=\"_blank\"\u003eClick here to request a custom engine with our free engine quote questionaire.\u003c\/a\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c!----\u003e"}]
Type: LS3 6.8L Displacement: 416 Cubic Inches Compression Ratio: 11.2:1 Bore x Stroke: 4.065 x 4.000 Rev Limit: 7000 RPM Crank: Callies Forged Rods: Callies H-Beam Pistons: Mahle Motorsports Cam: Mast Custom 3-Bolt Core Cam Intake: Not Included Valve Springs: PAC Racing Dual Springs
*All hp numbers will be within 2% of the advertised number.
Mast Motorsports Handbuilt LS engines feature the best components and are assembled by professional machinist. All handbuilt engines feature ARP Main Studs, ARP Head Bolts and a balanced and blueprinted block.
The 630 Performance Street Long Block’s heart and soul is the new 4.065 aluminum block. It has a Mast Motorsports engineered camshaft that is custom ground on a Mast Motorsports billet cam core. The 416 foundation is a honed and decked LS3 aluminum block with a 4.000” forged Callies rotating assembly with Mahle pistons that is topped off with Mast Custom Cast cylinder heads. ARP fasteners are used throughout and Mast pushrods ride on LS7 hydraulic roller lifters. The 630 Performance Street Long Block is the first release of a diverse line of Mast Motorsports hand built LS3 based long blocks that are designed for the Hot Rod/Muscle Car market. The 630 Performance Street Long Block peaks at the 630+ horsepower mark and is competitively priced for such a powerful complete long block.
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