BigBoost B58 EFR Turbo Kit

BigBoost’s stage 3-4 turbo for the B58 Gen 1 and 6 Port TU engine!

What’s included?

• BorgWarner EFR 8374, 8474, 9174 or 9280
• Cast twin-scroll manifold 40% larger than stock runners and area with external wastegate port.
• Aviation grade stainless steel oil feed lines
• Oil feed and return fittings for turbo
• Oil feed fittings for engine
• Oil drain adapter
• Lower Boost Pipe
• Aluminum 4″ inlet pipe
• Silicone couplers
• Smart Seal Stainless Steel Hose clamps
• Turbo coolant inlet and outlet banjo fittings
• Engraved Heat Shield
• VPE V Band Clamp
• Exhaust Manifold Gasket
• OEM O-ring kit
• Aeroquip Coolant Hose Kit
• EWG Mounting Bracket
• EWG Linkage Kit

EFR 8374 to 650 WHP 8474 and 9174 up to 750 WHP, 9280 up to 900-1000 WHP

The items installed or applied to vehicles are intended strictly for off-road use only and track vehicles. These modifications may not comply with emissions, safety, or environmental regulations required for public road use under Environmental Regulatory Agency (ERA) laws. It is the sole responsibility of the vehicle owner or operator to ensure adherence to all applicable local, state, and federal regulations. Use on public roads may result in legal penalties or vehicle impoundment. Always verify compliance with local authorities before installation.

We get a large number of custom orders and requests everyday, so as a result it is not always possible for us to keep every item in stock at all times in our warehouse. If you require the item urgently please contact our sales team here to check the stock before you make your purchase.

If you're unsure whether a part will fit your vehicle, feel free to contact us here with your inquiry. Our helpful sales team will reach out to confirm if it's the right match for you.

We offer a flat-rate shipping fee across the continental United States. This excludes Alaska, Hawaii, and U.S. territories. For international orders, additional shipping costs will apply. Please contact us for a quote if you are outside the continental U.S.

Also, feel free to also contact us at ColoradoN5X@Gmail.Com for any other questions.

Not all items are covered by warranty. Items including warranty, will clearly state that there is warranty within the product description. Most of these items will be a standard 1-year warranty against manufacture defects. You, the customer, will be responsible for shipping and handling. We will fix/replace that item with a product that is in working condition if you meet the warranty criteria. Please note that you will be allowed ONLY 1 claim within the year for that product. ColoradoN5X is not responsible for any damage caused during the installation of our products.