About Us
Factory Tour
Quality Control
Contact Us
Request A Quote
Home About Us


Price wise, totally beats your walk in auto parts store. Just 1 coil at AutoZone was $88 So complete set for $60 was a no brainer. No issues with inst

—— Aaron

Huge savings compared to others and worked perfect.

—— Sabina

Perfect fit for my 2002 Lexus RX 300.V-6 engine

—— Perfect fit for my 2002 Lexus

They work great on my F150. No problems during installation and my engine runs great now. The Check Engine Light is off. And this was a much lower pri

—— Wile E. Coyote

I'm Online Chat Now
QC Profile


The Best Quality and Technology, Being with Customer’s Satisfaction


Elite Manufacturing and Testing


MITSUBASHI engineers and manufactures high-quality ignition components at SMP’s 60,000 sq. ft. facility in Bialystok, Poland.

Highlights of the TS16949-certified facility include lean manufacturing methods and vertically integrated manufacturing processes that include multi-spindle winding, injection molding, potting, curing, and welding.

To ensure quality, all products manufactured at the facility undergo a full spectrum of measurement and life testing in addition to a full range of environmental analysis that includes thermal shock, thermal cycling, salt spray, vibration, and storage tests.

Coil-on-Plug Breakdown


A coil-on-plug is designed to perform the functions of the ignition coil (creating the spark energy) and the spark plug wire set (containing and delivering the high voltage energy to the spark plug). To ensure proper function, MIS® Coil-on-Plug Assemblies feature premium-quality components.

Ignition Coil Testing

We performed an extensive engineering analysis of OE DG500 and DG508 to MIS®. The engineers measured winding resistance, inductance and output voltage, spark, energy, waveform peak voltage and ringing, as well as a complete physical and sectioned comparison to OE.


  Primary Secondary Output Voltage Spark Energy
  Resistance Inductance Resistance Inductance 50pf 60 Hz 60 Hz
Part no. (mohms) (mH) (kohms) (H) (Peak kV) (mV-S) (mJ)
MIS® E261 492 1.53 5.36 9.59 25.2 3.70 29.6
MIS® E262 489 1.49 5.28 9.47 25.2 3.74 29.9
Average MIS® 491 1.51 5.32 9.53 25.2 3.72 29.8
OE DG500 515 1.63 5.55 8.61 24.4 3.72 29.8
OE DG508 511 1.58 5.50 8.19 24.2 3.69 29.5
Average OE 513 1.61 5.53 8.40 24.3 3.71 29.7


                                                     MIS® E261

The Findings

MIS® Ignition Coils look, fit and perform like the original they relace with 100% end of the line production testing. The MIS® coils also provide an improved secondary winding design (additional winding bays) that helps prevent internal arcing and high-voltage breakdown.

  • The MIS® coils tested 3.7% higher than OE in output voltage.
  • The MIS® coils were equal to OE in spark energy.
  • In waveform testing, MIS® coils’ peak output voltage was about 1000 volts higher than OE.
  • The MIS® coils had a longer spark duration than the OE, resulting in more energy supplied to the spark plugs.

The MIS® coils match or exceed the OE coils in all categories and are an excellent replacement exceeding the OE performance.


  • Standard:SGS


    Issue Date:2017-12-05

    Expiry Date:2018-12-27

    Scope/Range:Ignition Coils

    Issued By:SGS

  • Standard:ISOTS16949_2009


    Issue Date:2017-12-06

    Expiry Date:2018-12-06

    Scope/Range:Ignition Coils

    Issued By:TUV

  • Standard:ISO9001_2008_TUV中文-


    Issue Date:2017-12-07

    Expiry Date:2018-12-12

    Scope/Range:Ignition Coils

    Issued By:TUV

  • Standard:AQA


    Issue Date:2017-11-15

    Expiry Date:2019-04-17

    Scope/Range:Ignition Coils

    Issued By:AQA

  • Standard:OSS


    Issue Date:2017-02-27

    Expiry Date:2020-03-26

    Scope/Range:Ignition Coils

    Issued By:OSS

Contact Details

Contact Person: Mr. Calvin

Tel: +86-510-82251800

Fax: +86-510-82251625

Send your inquiry directly to us (0 / 3000)