Boost Logic Engine Sleeves for 991 Porsche 911 Turbo [BL 04030401]
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Boost Logic Engine Sleeves for 991 Porsche 911 Turbo
Boost Logic’s Engine Sleeves for 991 Porsche 911 Turbo are iron cylinder sleeves for the 2014 to 2019 911 Turbo, made for engine builds that take the 3.8-liter twin-turbo flat-six well beyond factory output. Boost Logic describes them as precision engineered to exact specifications and built to endure extreme conditions under intense driving. This is a machine-shop part for a full engine rebuild, suited to a car heading for the higher power levels of a big turbo kit; a stock or lightly modified Turbo has no need for them.
Features
- High-quality iron construction, per Boost Logic
- Precision engineered to exact specifications
- Designed for longevity under high-performance and extreme driving conditions
- Part of the Boost Logic 991 Turbo engine internals range, alongside its pistons and rods
Applications
- Porsche 911 Turbo: 991.1 | 2014-2016 | 3.8L Twin Turbo Flat-Six
- Porsche 911 Turbo: 991.2 | 2017-2019 | 3.8L Twin Turbo Flat-Six
Notes
- Boost Logic does not state how many sleeves are supplied; the vendor photo shows six, one for each cylinder, so confirm the quantity with Bulletproof Automotive before ordering
- Cylinder sleeves are installed into a machined block by an engine builder; this is not a bolt-on part
- Boost Logic publishes no bore size, wall thickness or power rating for the Engine Sleeves for 991 Turbo
- Related 991 Turbo internals: Boost Logic Spec Pistons for 991 Porsche 911 Turbo and Boost Logic Spec Carrillo H Beam Rods for 991 Porsche 911 Turbo; the pistons are set up for the stock bore, so confirm compatibility before combining them with sleeves
- The 1300 hp and 1500+ hp levels of the Boost Logic Widowmaker Turbo Kit for 991 Porsche 911 Turbo call for a built motor
Frequently Asked Questions
- What are the Boost Logic Engine Sleeves for 991 Turbo made from? Boost Logic makes the Engine Sleeves for 991 Turbo engines from high-quality iron. It describes them as built to withstand the demands of high-performance driving and to last under intense use. Boost Logic does not publish wall thickness or bore size, so the engine builder should confirm the specification against the rest of the planned build.
- Which 911 Turbo models do they fit? Boost Logic lists the sleeves for 2014 to 2019 Porsche 911 Turbo models, which covers the 991.1 and 991.2 generations with the 3.8 liter twin-turbo flat-six. The later 992 Turbo uses a different engine and is not listed. Confirm the exact model year with Bulletproof Automotive if the car has already had engine work.
- How many sleeves come in the set? Boost Logic does not state a quantity in its description. The product photo shows six sleeves, which matches the six cylinders of the 991 Turbo engine, but that should be confirmed before ordering. Contact Bulletproof Automotive and we will confirm exactly what ships under part number BL 04030401.
- Can the sleeves be installed without taking the engine apart? No. Cylinder sleeves are fitted to the engine block during a rebuild, so the engine has to come out and be disassembled, and the block machined to accept them. This is work for an experienced engine builder, and it is best planned together with pistons, rods, gaskets and machine work when budgeting the build.
- Will the sleeves add power? Not on their own. Boost Logic says the sleeves contribute to engine performance, but their role is to give a built engine the cylinder strength to hold more boost. Any gain comes from the turbochargers, fuel system and tune that the stronger engine allows, and Boost Logic publishes no power rating for the sleeves themselves.
About Boost Logic
Boost Logic was founded in Austin, Texas in 2003 and made its name with Toyota Supra turbo kits, setting street car records at 6speed record days and the Texas Mile that stood long after the company stopped racing Supras competitively. It designs turbo systems, titanium exhausts, intercoolers and engine components for the Toyota Supra, Porsche 911 Turbo, Nissan GT-R, Ferrari and Lamborghini, and its R35 GT-R builds have trapped over 180 mph in the quarter mile and over 200 mph in the half mile.
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- Please review the product dimensions carefully to ensure the right fit for your space
- Color may vary slightly due to lighting and screen settings
- Materials and finishes are selected for both durability and visual appeal
- Some items may require simple assembly upon delivery
- Perfect for both everyday use and long-term comfort
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Product Size Guide
Please refer to the general size reference below to better understand how this product may fit into your space. Dimensions may vary slightly depending on the design and materials.
| Category | Small | Medium | Large |
|---|---|---|---|
| Decor & Accessories | Up to 10″ | 10″ – 20″ | 20″+ |
| Tables | Up to 30″ | 30″ – 60″ | 60″+ |
| Seating | 1 Seater | 2–3 Seater | 4+ Seater |
| Storage Units | Compact | Standard | Large Capacity |
| Lighting | Small Fixture | Standard Fixture | Large Fixture |
Note: For exact product dimensions, please refer to the specifications section above. This guide is intended as a general reference only.
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Boost Logic Engine Sleeves for 991 Porsche 911 Turbo [BL 04030401]
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