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For sale REBUILT Bullseye Power / Borg Warner S371 Billet T3 Turbo


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Long before Borg-Warner offered the S372SX-E, Bullseye Power built their own comparable S300-frame turbo by combining a 71/102mm K31 billet compressor wheel to an 80/71mm S300 turbine in their own .70 T3 turbine housing. This is one of those rare units.

This was a low-mileage unit which came to me from a customer who had planned to use it on a K24 build but somehow oiled it improperly and it failed. Not sure what happened but it's apparently been forgotten-about and has been sitting here well over a year, so it's time to go.

Compressor inlet is 4", outlet is 2.5". Oil feed inlet on the bearing housing is 1/4" NPT, the oil drain flange accepts all popular Garrett T3 drain hardware. Proper oil supply and drainage is crucial for the S300 center housing. This turbo must be supplied with no more than 80psi of oil pressure under load or you risk causing oil-related damage to the turbo for which I will not accept responsibility. The oil drain must be as straight as possible, have no kinks, and must not dip below the fitting on the oil pan at any point. DO NOT USE A 10AN DRAIN. Improper oil drain size will over-oil the cartridge and cause damage that is not covered by any type of warranty repair.

The price is just $600 SHIPPED for this turbo to the lower 48 states only- I cannot ship to Canada or Internationally.

Paypal is accepted; the buyer will be responsible for any fees associated with submitting / receiving the payment. All interested parties can contact me via Private Message here on Tuners or via email at [email protected]. Priority given by order of contact.

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