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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BAM!!! There it is!!!

Hopefully be ready around end of the year for new UCON applications!!
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1 day ago

2005 Tacoma XRunner with URD Supercharger system and URD built engine making 540 RWHP. Going to raise the boost very soon..... ... See More

3 days ago

URD will be attending the annual XFest event again this year with our URD Supercharged XRunner. It will be held October 9-11th at the Wisp Resort in McHenry Maryland. Hope to see you there!!

More info can be found here:

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2 weeks ago

The URD Spec-U Tuned Equal Length Long Tube Headers for the 2012-2015 Tacoma V6 are now ready for orders!!!

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2 months 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