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Big Boost

B58 STAGE 4 TURBO KIT

B58 STAGE 4 TURBO KIT

$3,850.00 USD
$3,999.99 USD $3,850.00 USD
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Shipping calculated at checkout.

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

What’s included?

  • BigBoost MPR 65mm turbocharger (Optional Dual Ceramic Ball Bearing CHRA) (Optional Garrett GEN2 GTX3582R)
  • Cast twin-scroll manifold 40% larger than stock runners and area with external wastegate port.
  • Turbosmart 38mm Wastegate  
  • Aviation grade stainless steel oil feed lines
  • Oil feed and return fittings for turbo
  • Oil feed fittings for engine
  • Oil drain adapter
  • Turbo to Throttle Body charge pipe
  • Aluminum 4″ inlet pipe
  • Silicone couplers
  • Hose clamps
  • Turbo coolant inlet and outlet fittings
  • Engraved Heat Shield
  • VPE V Band Clamp
  • Exhaust Manifold Gasket
  • OEM O-ring kit
  • Aeroquip Coolant Hose Kit

Stage 4 (65mm) (820 WHP) (Optional Garrett GTX3582R 6662 turbo)

***IMPORTANT NOTE***

The Stage 4 Turbo Kit will require custom tuning via a known platform MHD or BM3 where your tuner will need to disable your factory Electronic Wastegate! 

YOU NEED TO ORDER A BOOST CONTROLLER WE RECOMMEND GFB GFORCE III Part Number 3005

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Customer Reviews

Based on 1 review
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Alexander Ignatovets (St Louis, US)
Product is fine customer service is horrible

Product looks nice and seems good so far, but micheal was horrible to deal with, ignoring emails for weeks, getting upset with me for wanting an update, just not good overall.

Hi Alexander,

I'm happy you're at least enjoying the turbo kit.

As for your experience, I emailed you 1 day after the order went in that these kits were built to order and had a typical lead time of 3-5 weeks, but sometimes it can take longer. I also told you that Big Boost doesn't give us fast replies, and we often have to wait days or longer for a response. I told you multiple times, as soon as I hear anything I will get back to you. You constantly bombarded us with emails no matter how many times I informed you there was no current updates on your order.

I'm sorry you weren't happy with your experience, but you are not the only customer we have to assist, we have hundreds of customer emails to reply to a day. Sending us emails every day asking the same question does not speed the order up.