BMW N55/S55 Direct Injectors

The Precision Raceworks N55/S55 Upgraded DI Injectors are designed for customers looking to push the limits without port injection (or in addition to port injection).  Our high flow injectors were developed in a partnership with NHP, taking advantage of resources offered by both companies to produce the highest quality and highest flowing direct injector upgrade ever for the N55 engine.

These high flow injectors flow 55% over stock!  This means that these can support up to *950 whp on gasoline or *715 whp on E85 without PI!

Each injector is tested and calibrated using state of the art high pressure flow calibration equipment and then matched to a set of 6.  

Installation of these is a snap and is as simple as replacing your injectors, a little coding, and then checking a checkbox!  You can make installation even easier with our Direct Injector tool!

Can I run E85?  Of course!  Just like all other Precision Raceworks products our direct injectors are compatible with E85 and all other fuels as well!

Is it supported by tuners?  Absolutely!  The Precision Raceworks stage 2 direct injectors are supported by MHD, Bootmod3, Ecutek, and others.  If you need help beyond that just give us a shout and we will get you fixed up!

***Only works with cars with factory electronic wastegate***

* whp is a theoretical based on overall capability of injectors and with a fully built system and all supporting mods. 

Precision Raceworks shipping & returns

• Returns: new, unused parts can be returned within 30 days of shipment. Parts that have been installed, mounted or modified can't be returned, refunded or exchanged.
• Restocking fee: eligible returns are refunded or exchanged minus a restocking fee of up to 25%. Shipping charges, insurance and duties are non-refundable, and return shipping is paid by the customer.
• Special orders and customized items can't be cancelled, returned or exchanged.
• Cancellations: orders can be cancelled for a full refund only before they ship.
• Back-orders ship as soon as they become available and can be cancelled for a full refund before they ship.
• Damage or wrong item: inspect your package on arrival and contact us within 2 business days, keeping the original packaging and photos of any damage.
• It's the customer's or installer's responsibility to confirm the correct size and application before installing any part.

To start a return or ask a question, contact us with your order number.