--- title: Holley Sniper EFI 2 Installation and Tuning Instructions description: "Holley Sniper 2 EFI Quickstart Manual:  199r12505_website.pdf (holley.com) Part # 550-510-3XX Quickstart guide: 199r12505_website.pdf (holley.com) Overview and Install Videos: Sniper 2 EFI Technical S" --- [Skip to content](https://knowledgebase.blueprintengines.com/knowledge/holley-sniper-efi-2-installation-and-tuning-instructions#main-content) English Show submenu for translations ![IN CRATE ENGINES..png\]](https://knowledgebase.blueprintengines.com/hs-fs/hubfs/IN%20CRATE%20ENGINES..png?height=40&name=IN%20CRATE%20ENGINES..png) Open main navigation Close main navigation - English Show submenu for translations - Go to www.blueprintengines.com Go to www.blueprintengines.com How can we help you? - There are no suggestions because the search field is empty. 1. [Knowledge Base](https://knowledgebase.blueprintengines.com/knowledge?hsLang=en) 2. 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[Fuel Systems](https://knowledgebase.blueprintengines.com/knowledge/technical-support?hsLang=en#fuel-systems) # Holley Sniper EFI 2 Installation and Tuning Instructions **Holley Sniper 2 EFI Quickstart Manual:**  [Holley Sniper 2 EFI Quickstart Guide (199r12505)](https://documents.holley.com/199r12505_website.pdf) ### **Chevy Small Block** #### **327** Part # 550-510-3XX (verify exact part number suffix for your specific application) Quickstart guide: [199r12505\_website.pdf (holley.com)](https://documents.holley.com/199r12505_website.pdf) Overview and Install Videos: [Sniper 2 EFI Technical Support - Holley](https://www.holley.com/support/fuel_injection/sniper_2_efi/) #### **350** Part # 550-510-3XX Quickstart guide: [199r12505\_website.pdf (holley.com)](https://documents.holley.com/199r12505_website.pdf) Overview and Install Videos: [Sniper 2 EFI Technical Support - Holley](https://www.holley.com/support/fuel_injection/sniper_2_efi/) #### **355** Part # 550-510-3XX Quickstart guide: [199r12505\_website.pdf (holley.com)](https://documents.holley.com/199r12505_website.pdf) Overview and Install Videos: [Sniper 2 EFI Technical Support - Holley](https://www.holley.com/support/fuel_injection/sniper_2_efi/) #### 383 Part # 550-510-3XX Quickstart guide: [199r12505\_website.pdf (holley.com)](https://documents.holley.com/199r12505_website.pdf) Overview and Install Videos: [Sniper 2 EFI Technical Support - Holley](https://www.holley.com/support/fuel_injection/sniper_2_efi/) #### 396 Part # 550-510-3XX Quickstart guide: [199r12505\_website.pdf (holley.com)](https://documents.holley.com/199r12505_website.pdf) Overview and Install Videos: [Sniper 2 EFI Technical Support - Holley](https://www.holley.com/support/fuel_injection/sniper_2_efi/) #### 400 Part # 550-510-3XX Quickstart guide: [199r12505\_website.pdf (holley.com)](https://documents.holley.com/199r12505_website.pdf) Overview and Install Videos: [Sniper 2 EFI Technical Support - Holley](https://www.holley.com/support/fuel_injection/sniper_2_efi/) #### 427 (Builders Series) Part # 550-510-3XX Quickstart guide: [199r12505\_website.pdf (holley.com)](https://documents.holley.com/199r12505_website.pdf) Overview and Install Videos: [Sniper 2 EFI Technical Support - Holley](https://www.holley.com/support/fuel_injection/sniper_2_efi/) #### PS454 (Builders Series) Part # 550-510-3XX Quickstart guide: [199r12505\_website.pdf (holley.com)](https://documents.holley.com/199r12505_website.pdf) Overview and Install Videos: [Sniper 2 EFI Technical Support - Holley](https://www.holley.com/support/fuel_injection/sniper_2_efi/) ### **Chevy Big Block** #### BP454 Part # 550-510-3XX Quickstart guide: [199r12505\_website.pdf (holley.com)](https://documents.holley.com/199r12505_website.pdf) Overview and Install Videos: [Sniper 2 EFI Technical Support - Holley](https://www.holley.com/support/fuel_injection/sniper_2_efi/) #### 496 Part # 550-510-3XX Quickstart guide: [199r12505\_website.pdf (holley.com)](https://documents.holley.com/199r12505_website.pdf) Overview and Install Videos: [Sniper 2 EFI Technical Support - Holley](https://www.holley.com/support/fuel_injection/sniper_2_efi/) #### 502 Part # 550-510-3XX Quickstart guide: [199r12505\_website.pdf (holley.com)](https://documents.holley.com/199r12505_website.pdf) Overview and Install Videos: [Sniper 2 EFI Technical Support - Holley](https://www.holley.com/support/fuel_injection/sniper_2_efi/) 540 -  N/A 572 – N/A *No Sniper 2 EFI kit is currently available for these engines (540, 572). Contact [Holley Technical Support](https://www.holley.com/support/fuel_injection/sniper_2_efi/) for alternatives or future availability.* #### 598 (Builders Series) Part # 550-841 [199r11322r.pdf (holley.com)](https://documents.holley.com/199r11322r.pdf)  [199r11365.pdf (holley.com)](https://documents.holley.com/199r11365.pdf) #### 632 Part # 550-841 [199r11322r.pdf (holley.com)](https://documents.holley.com/199r11322r.pdf)  [199r11365.pdf (holley.com)](https://documents.holley.com/199r11365.pdf) ### **Ford Small Block** #### 302 Part # 550-510-3XX Quickstart guide: [199r12505\_website.pdf (holley.com)](https://documents.holley.com/199r12505_website.pdf) Overview and Install Videos: [Sniper 2 EFI Technical Support - Holley](https://www.holley.com/support/fuel_injection/sniper_2_efi/) #### 347 Part # 550-510-3XX Quickstart guide: [199r12505\_website.pdf (holley.com)](https://documents.holley.com/199r12505_website.pdf) Overview and Install Videos: [Sniper 2 EFI Technical Support - Holley](https://www.holley.com/support/fuel_injection/sniper_2_efi/) #### 408 Part # 550-510-3XX Quickstart guide: [199r12505\_website.pdf (holley.com)](https://documents.holley.com/199r12505_website.pdf) Overview and Install Videos: [Sniper 2 EFI Technical Support - Holley](https://www.holley.com/support/fuel_injection/sniper_2_efi/) #### 427 (builders series) Part # 550-510-3XX Quickstart guide: [199r12505\_website.pdf (holley.com)](https://documents.holley.com/199r12505_website.pdf) Overview and Install Videos: [Sniper 2 EFI Technical Support - Holley](https://www.holley.com/support/fuel_injection/sniper_2_efi/) ### **Chrysler Small Block** BPC4082CTC – N/A *No Sniper 2 EFI kit is currently available for these engines. Contact [Holley Technical Support](https://www.holley.com/support/fuel_injection/sniper_2_efi/) for alternatives or future availability.* BPC4085CTC – N/A ### **Marine** 355 – N/A 383 -  N/A 540 -  N/A 632 -  N/A - [General Support](https://knowledgebase.blueprintengines.com/knowledge/general-support?hsLang=en) - [Technical Support](https://knowledgebase.blueprintengines.com/knowledge/technical-support?hsLang=en#main-content) - [General Engine FAQ](https://knowledgebase.blueprintengines.com/knowledge/technical-support?hsLang=en#general-engine-faq) - [BluePrint GM Style Engines](https://knowledgebase.blueprintengines.com/knowledge/technical-support?hsLang=en#blueprint-gm-style-engines) - [BluePrint Ford Style Engines](https://knowledgebase.blueprintengines.com/knowledge/technical-support?hsLang=en#blueprint-ford-style-engines) - [Transmissions](https://knowledgebase.blueprintengines.com/knowledge/technical-support?hsLang=en#transmissions) - [Fuel Systems](https://knowledgebase.blueprintengines.com/knowledge/technical-support?hsLang=en#fuel-systems) - [Parts and Accessories](https://knowledgebase.blueprintengines.com/knowledge/technical-support?hsLang=en#parts-and-accessories) - [Carburetors](https://knowledgebase.blueprintengines.com/knowledge/technical-support?hsLang=en#carburetors) - [Alternator](https://knowledgebase.blueprintengines.com/knowledge/technical-support?hsLang=en#alternator) - [Term X](https://knowledgebase.blueprintengines.com/knowledge/technical-support?hsLang=en#term-x) - [Valve Train](https://knowledgebase.blueprintengines.com/knowledge/technical-support?hsLang=en#valve-train) - [Factory Five FAQ](https://knowledgebase.blueprintengines.com/knowledge/factory-five-faq?hsLang=en) - [Engine Specs](https://knowledgebase.blueprintengines.com/knowledge/engine-specs?hsLang=en) - [Discontinued Engine Specs](https://knowledgebase.blueprintengines.com/knowledge/discontinued-engine-specs?hsLang=en#main-content) - [Engine Support](https://knowledgebase.blueprintengines.com/knowledge/discontinued-engine-specs?hsLang=en#engine-support) [![Chill listening crop-3](https://knowledgebase.blueprintengines.com/hs-fs/hubfs/IN%20CRATE%20ENGINES..png?width=92&height=24&name=IN%20CRATE%20ENGINES..png "Chill listening crop-3")](http://navy-blueprint-logo) www.blueprintengines.com Help Center Copyright © 2026, BluePrint Engines