• Hondata Reflash - S2000 2006-2008 F22C with Toda Header

This reflash is only for use with a Toda header. This reflash is now incorporated into the FlashPro for the S2000 - a recommended tunable alternative.

  • VTEC point decreased from 6000 rpm to 4200 rpm
  • Rev limit 8500 rpm
  • Maximum torque gain 20 ft/lbs torque at 5800 rpm
  • Maximum power gain 23 hp at 5800 rpm
  • Fully dealer compatible - works with all Honda scan tools and equipment

This is for an ECU reflash - the ECU is not included.  Hondata does not sell direct - the reflash must be purchased from a Hondata dealer. The ECU reflash form must be sent with your ECU.


Within the USA this product is legal only for racing vehicles which may never be used upon a public highway.

Sales Region US/Canada
Model S2000
Year 2006-2009
Market US
Engine F22
Transmission MT
Part Number 37820-PZX-A09 to 37820-PZX-A21

Results for 06 S2000 with Toda Header, test pipe, exhaust and Hondata Heatshield gasket

  • Dotted red line - Reflashed ECU with Toda Header program
  • Dotted green line - Stock ECU

Click to enlarge picture

Tuning Notes.

This dyno chart shows an 06 S2000 with Toda header, test pipe, Hondata heatshield intake gasket and exhaust.

The only change between the two runs was the ECU program.

For clarification. The Hondata gasket adds about 3-4 ft pounds of torque across the rev range. There was no specific tuning for the gasket. The heatshield gasket adds this torque to a stock S2000.

The dyno chart represents the gains you can get with a Toda header, test pipe and reflash. Midrange torque from 4500 rpm to 6000 rpm is substantially improved; peak power only marginally.

Different types dynos will display different peak power numbers, however the gains shown between 4200 and 6200 rpm will be similar regardless of the dyno you use.

For this reflash we implement a VTEC window. Under 4200 rpm you will always be on the low cam. Over 6000 rpm you will always be on the high cam. Between 4200 rpm and 6000 rpm you are on the low cam at cruise and light throttle switching instantly to the high cam at wide open throttle.


Click to enlarge picture

This graph shows:

  • 06 S2000 with Heatshield gasket, exhaust and Hondata reflash with stock header and cat - red line.
  • 06 S2000 with Heatshield gasket, exhaust and Hondata reflash with Toda header and test pipe - blue line.

The purpose of this test was to see the difference the Toda header and test pipe made.

The Toda header and test pipe were first tested with the standard Hondata 06 S2000 reflash.

The gains were only minimal, partially because the car was running very lean from 5500-6000 rpm. Lowering the VTEC point adding fuel and optimizing the ignition resulted in the reflash detailed above.

Combining an ECU reflash with a Toda header makes more gains than each individual item.

The intakes manifold on the S2000 series engines get very hot. They have a metal intake gasket which transfers heat from the head very quickly. Pay lots of attention to keeping everything cool and you will see results. The S2000 Hondata intake gasket reduces intake temps about 15-40 degrees F, adds 2-4 ft pounds of torque and 4-5 peak HP.

What if I already have the reflash for the stock S2000?

If you already have the reflash for the stock 06 S2000 then the upgrade price is $200.

Will a different brand header work?

While we will not create custom tunes for any other combinations of bolt on parts, other headers will probably be ok. You should always dyno the engine with the reflash to make sure the air/fuel is within a safe range. If the header does not work then your options are to switch to a Toda header or return your ECU to stock.

Can I use an 2006 ECU in my 2000-2005 vehicle?

This is not easy nor cheap, and we do not offer support for such a swap - at the least the engine sensors, sensor wheels, throttle body, ECU, vehicle harness, ECU harness, dash harness and cluster would need to be changed.

How do I get the reflash?

You will need to remove the ECU and via a dealer send it to Hondata. Unlike reflashes for other Honda models you will not need to send the key and immobilizer; just the ECU. Fill out this form and contact a Hondata dealer. Hondata does not sell direct.

How do I remove my ECU?

The ECU is located behind plastic panels to the left of the driver's left foot. You will need a 10mm socket. This is what it looks like - in place and removed from the car.

Some 2002 onwards and all 2006 onwards ECUs are flash programmable. The ECU can be repeatedly reprogrammed without removing or replacing and internal components.

How do you get your ECU reflashed?

  • Fill out this form
  • Contact your dealer. All sales are made through Hondata dealers.
  • Your dealer or you will need to remove and send your ECU, immobilizer and key to Hondata.

Do I need to send the key & immobilizer?

Only for 2002-2006 RSX and 2002-2005 Civic Si reflashes. All other reflashes do not need to send a key or immobilizer. Flashing the ECU does not in any way alter the immobilizer operation.

How long does it take?

The ECU will be reprogrammed and shipped out the same day it is received. Shipping in the continental USA is FEDEX next day.

Will this affect the fuel economy?

Assuming you drive the vehicle in the same way, no. Fueling at cruise is the same as stock.

Will this affect the engine life?

Provided your engine is maintained correctly this modification should not affect the engine's life.

Will this affect the warranty?

It should not.

Federal law sets forth requirements for warranties and contains a number of provisions to prevent vehicle manufacturers, dealers and others from unjustly denying warranty coverage. With regard to aftermarket parts, the gist of the law is that warranty coverage cannot be denied simply because such parts are present on the vehicle, or have been used. (see Federal Warranty Laws for details). The warranty coverage can be denied only if the aftermarket part caused the malfunction or damage for which warranty coverage is sought.

If a dealership denies warranty coverage (more details here) , they should be willing to do so in writing. Have the dealer describe the failure which is causing your problem AND how the dealer believes the aftermarket product installed is responsible for the problem. Keep an accurate log of all contacts and correspondence in addressing the warranty denial. Hondata will provide any technical information the dealership requires.

With any increase in rev limit there is an increased risk of valve damage. To minimize your risk use the Hondata program with the stock rev limit. All reports of valve damage we have heard have been as a result of miss-shift. The Type S valve springs are good. We have tested a Type S with an 8900 rev limit in a press test vehicle for several months with no problems.

Will any settings be lost?

Your ECU will lose some idle settings and fuel trim when it is unplugged. It will relearn idle automatically if you leave it idling for 10 minutes. As you drive the car it will relearn fuel trim values in a matter of minutes.

Can a Honda/Acura dealer erase this program?

Only if another Honda/Acura update is released could a dealer erase your existing program. If Honda/Acura comes out with an upgrade you are not obliged to have it installed. If you do not wish to have the dealer program installed there is a wire you can disconnect or cut, to prevent reprogramming. The charge for restoring an erased program is $75 (cashiers check or money order) shipping included.  You can also remove pin 7 from the OBD2 port to keep the dealer from reflashing your ecu (DO NOT CUT THIS WIRE).

What about bolt ons?

Most programs have been tested to work well with a variety of intakes and exhausts. No retuning is necessary after an intake is added.  Some programs as tuned specifically for an intake or exhaust, and if so, will mention this in the reflash notes.

If you currently run nitrous, these programs will probably not be suitable due to the ignition advance used. If you want to use nitrous and this program now, you must install a nitrous system that retards ignition.

What about turbo-charging and super-charging?

Use the K-Pro or FlashPro.

What octane is recommended?

For high compression engines (K20A2, K20Z1, K20Z3, K24Z7) 91 octane fuel or better is recommended.  For all other engines there are gains from using higher octant fuel, as the ECU will automatically advance the ignition timing if no knock is detected.

Hondata Reflash - S2000 2006-2008 F22C with Toda Header

  • Brand: Hondata, Inc.
  • Product Code: Reflash - S2000 2006-2008 F22C with Toda Header
  • Availability: Discontinued