Our complete ignition system is designed to replace the factory pencil style coils which are prone to failure and incapable of properly supporting the needs of high horsepower applications.Our kits all comes complete with new ignition coils designed in house and manufactured to our specifications based on the needs and capability of the N54engine. 


Before now the only solutions for the N54 community were all pencil style coils which are incapable (due to size limitations) of producing the same output as larger Ignition Block style coils.  To make the best of the small package the pencil coil has, they are designed for high voltage output but very low current output.  This means the spark will bridge the gap on the spark plug and then disappear.  There is no duration to the spark and in the event the fuel does not ignite (or ignite fully) in that very short period of time you will have a misfire or incomplete burn.



Because of the constraint of space to put components in a pencil coil reliable and proven ACDelco ignition coils(PN D585 / LS Truck Coils) paired with short plug wires are used in high horsepower applications everywhere. So why didn’t we just make a kit using these coils since they are the “standard” in many high horsepower applications? 

    • Your car is specifically designed to run “Dumb Coils” and the ACDelco coils are “Smart Coils”

This leaves four options for adapting the car to work with them

  1. Remove the factory DME and replace with Standalone system

      - Very costly & you lose some factory functions


  1. Remove the factory DME and change circuitry of the board to control “Smart Coils” instead of “Dumb Coils”

- Not a plug and play solution you can do at home, requires sending off your factory DME for custom work


  1. Add additional electronics to convert the IGBT output from the factory DME back to 5V square wave to drive the “Smart Coils”

-  The factory system only has 1 IGBT system that can fail this solution has two IGBT systems that can fail, plus an additional converter box that can fail as well.  This results in 3 possible failure points.  In addition the DME no longer can “see” the coils which could cause other potential problems with how the computer is designed to monitor and react.


  1. Use the IGBT negative output and constant power with resistor to drive the IGBT inside the "smart coil" backwards

-  As above the factory system only has 1 IGBT system that can fail this solution has two IGBT systems that can fail, plus a resistor which heats up and can fail as well.  This results     in 3 possible failure points.  In addition the DME no longer can “see” the coils which could cause other potential problems with how the computer is designed to monitor and react.

-  Flashing of the DME to suppress errors caused by using "Smart Coils" in place of "Dumb Coils" is required

-  During testing of this approach it was found that the ignition coil produced about 1/2 of its original capability

-  Testing also showed an increased stress on the IGBT in the coils increasing the failure rate and overall longevity of the coil


    • The ideal dwell time (calculated based on Duty cycle, RPM, and Duration) plays a big role in selecting the right ignition coil in any application

The maximum dwell time of 3.5ms is a fixed value for the N54 engine (allowing headroom for built motors turning more RPM)

  1. The ACDelco coil has an ideal dwell time of close to 4.5ms

-  Since the ACDelco coil would only be allowed a maximum charge time of 3.5ms the output is greatly reduced to 90mj while the Precision Raceworks coil is capable of 118mj


So not only as explained above using a “SmartCoil” isn’t a great idea on the N54 as it is not designed for it you also need to consider the ideal dwell time allowed  by the car and the design of the coil when making the proper selection.  We have also included the quick reference chart below to better understand performance of the LS coil, OEM coil, PR coil,and for fun Lamborghini coil.  Showing that there is no standard each coil is designed to work within specific calculated dwell periods so the correct coil must be selected or designed for each application.


  •  Why choose Precision Raceworks

By designing our own coil we were able to take into account the available dwell time of the N54 as well as the IGBT system being built into the DME.  We were even able to take into consideration the ohm load of the factory BMW coil that came in the N54.  What this means is our coil looks exactly like the factory coil to the DMEmaintaining all functions allowing the computer to monitor and react as designed by the engineers at BMW.

So these coils have 250% more output than the factory coils what does that mean for my DME as they are already prone to heat issues and component failures?

    • Output is directly related to input current and time so let’s look at the math below using the given information from the chart above.  We will use saturation dwell as this is the maximum output (the hardest the coil can work)

BMW  Coil - 7.425amps / 2.7ms dwell  = 2.75a per ms

PR Coil -  9.045amps / 3.7ms dwell = 2.44a per ms

For additional information we have provided the ACDelco and Lamborghini as well to see how they would react and load our system.

ACDelco Coil – 6.75amps / 5ms dwell =  1.35a per ms

*Lamborghini Coil -  16.2amps / 2.5ms dwell = 6.48a per ms

*This would result in 236% more strain on our electrical system if used requiring upgrades to other components to be stable

    • So as  you can see while the PR coil pulls more current to have higher output it is capable of doing it over a longer period resulting in less load on the electrical system.


  • Summary

o  Precision Raceworks coils are designed specifically for your car

o  OEM Resistance Matched (DME Flash through MHD provides additional performance)

o  DME Flashing Not Required  (DME Flash through MHD provides additional performance)

o  Designed for optimal dwell time available

o  More energy output than any other coil tested under 3.7ms

250% more energy than the BMW coil pack (With Out flashing the DME the PR coils put out 200% more the Factory BMW Coils!)




Items listed with an ETA posted are subject to our PREORDER POLICY. Pre order sales will be subject to a 15% cancellation fee in the event the customer no longer wants to wait for the item.

Items listed on sale and on pre order are not subject to cancellation. ALL SALES FINAL. 


Rush Customs will only handle returns for the direct purchaser. If the purchase was made from a retailer other than, please contact the place of purchase for further assistance.

You must open and inspect items within 48hrs to confirm no damage and or correct product in order to qualify for a refund or exchange. 

Returns on ‘new’ merchandise for exchange or refund will be allowed within 30 days from the date of shipment. ‘New’ merchandise cannot be used or show signs of damage from installation or mounting. If you install or modify parts ordered in any way, you automatically waive your right to returns, refunds or exchanges. Exchange shipping costs is the responsibility of the customer.

All returns must be accompanied with a ‘return merchandise authorization’ (RMA). To receive an RMA, you must contact Rush Customs at When requesting an RMA, please provide the following details: Name, Order Number, Date of Purchase, and Phone Number. Returns will not be processed without an RMA. Returns must also be received within 14 days from the issuance of the RMA. A RMA does not guarantee a refund or replacement.

All returns will be inspected upon return to Rush Customs for return eligibility. Returns must be shipped prepaid by the customers. Please maintain all shipping and tracking information until your return is processed since Rush Customs is not responsible for items lost in shipment. Shipping charges are not refundable. Please include a copy of your original invoice and contact information with all returns.

Eligible returns will be exchanged or refunded less a 20% restocking fee. Refunds will be issued by check or to the credit card used for the original purchase.

Purchases may be cancelled for a full refund before the order ships. Please contact Rush Customs immediately at to stop the processing of an order. Once cancellation is confirmed, a credit will be issued.

Orders already shipped from Rush Customs facility or drop-shipped vendor's place of business cannot be cancelled and will fall under the Returns for Refund or Exchange guidelines.

Special order or customized items cannot be cancelled, returned or exchanged.

It is the responsibility of the customer/installer to verify the proper size and application of all parts before installation.

We will not be responsible for packages marked as delivered. It is the customers responsibility to file a lost or stolen package claim with the shipping company used for shipping. 



You will be responsible for paying any customs or duty fees related to your shipment. Rush Customs will not be held liable for items that have been refused delivery due to customs fees and duties. Please email us is you have any questions or concerns. 



We now offer price matching for major brands.

Price Match Guarantee

What qualifies?

Your product may be eligible for price matching if it is:

Identical to the competitor's product.

The product must be a matching brand, model number and color to qualify.

Immediately available at a qualifying online retailer, or a local competitor.

Only applies to advertised listed price from large websites. Does not include private message or private email deals.

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Product brands may be disqualified at our discretion. 

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