Underdog Racing Development is a performance parts supplier, manufacturer and development company specializing in Toyotas


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  • URD Spec-U Exhaust Release

    URD is proud to announce our new Spec-U exhaust system for the 2005-2013 Tacoma V6 and 2003-2009 4Runner. This is the ultimate performance exhaust system for your truck and it is ready for the race track. The Spec-U system enhances power and torque throughout the RPM range and has a completely unique exhaust note.

    Hear it on this product video
  • 2TR-FE Supercharger Kit

    URD has released this advanced supercharger system for the 2005 and later Tacoma with the 2.7L 2TR-FE 4 cylinder engine. The before dyno using a DynoJet chassis dyno was 117 RWHP. The after dyno was 248 RWHP. The after dyno was done without the catalytic converters installed and the Stage 2 pulley.

    Check out the dyno chart & video
  • Spec-U Equal Length Headers

    URD is proud to announce our new Spec-U True Equal Length Long Tube Header for the 1GR-FE 4.0L V6 engine. We have tested different tube lengths in an effort to maximize the low end torque production without sacrificing the upper end power gains. The equal length design also improves the sound or tone of the exhaust.

    Read the reviews

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Use coupon code THANKS2015 for 15% off. Does not apply to things already on sale.

Whats new??

URD is now a stocking warehouse distributor for Magnuson Superchargers. We have Magnuson Supercharger Kits in stock for the 5VZ-FE 3.4L, 1UZ-FE 4.5L Landcruiser, and 3UR-FE 5.7L Tundra!! Sorry, the sale does not apply to them.

URD has finally gotten all the ECU connectors we need to make a production run of our UCON-Ethos EMS for the 2009-2015 Tacoma V6 and 2010+ FJ and 4Runner. Look for those applications to start shipping around the end of December!!! This has been a long painful process, but it is finally happening!!!

Once we have the UCON-Ethos done and shipping for the 2010+ 4Runner and FJ, we can finally put our Whipple TwinScrew Supercharger kit for those trucks into production. Yes, it is as AWESOME as you have been hearing....

Got a couple of other very cool things almost ready. Stay U-Tuned!!!
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5 days ago

Coming soon!!! ... See More

1 week ago

This just in from a customer:

I just wanted to say THANKS!

Ref order #32360

It is always easy to have a good relationship when everything goes right. The real challenge is how we handle out relationship when things go wrong.

The clutch sent initially was the wrong one. Of course, my shop didn't know that until my truck was on the lift with tranny removed. I reached out to URD and after a little discussion, URD promised to get a replacement to me ASAP. URD kept their word and it appears that someone hand delivered it the next day.


I have my truck back now and am very pleased so far.

Please pass along my thanks and appreciation to those involved for such positive and timely support.

I will not hesitate to consider URD for future performance upgrades on Buster, my favorite TACO.


Ellicott City, MD
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1 week ago

This just in from a customer:

Hi i wanted to send a quick thank you for the URD intake and MAF calibrator. I've been upgrading cars for awhile now and have never installed a kit that was so seamless. Love the sound!

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2 weeks ago

I have been getting calls from people asking if we are running a Veterans Day Sale. Well, YES. If you are a Veteran please allow URD to say "thank you for your service" by giving you a discount. Please call to place your order. I will be here until 1700 East Coast time 877-887-3872 x2.

Yes, it is only for actual Veterans!!!
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3 weeks ago

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Tuning has never been easier.

UCON-EMS Advanced Engine Management for Toyota 1GR-FE 4.0L V6

Tap into your engine's potential

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Underdog Racing Development