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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URD has added some new exhaust systems to our line up.

We now have our standard URD Mk3 Cat-Back system for the 2005 and later Tacoma Double Cab with the LONG BED and our Spec-U system for the same truck.

We have also added the Standard URD Mk3 Cat-Back with twin mufflers and our Spec-U exhaust system for the 2010 and later 4Runner V6.

All of our systems are made in USA of 304 grade stainless steel.

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4 days ago

www.youtube.com/watch?x-yt-ts=1422579428&v=GY2AgdYn8JE&x-yt-cl=85114404 ... See More

URD 2.825" Pulley for your TRD supercharger

4 weeks ago

I have a production prototype of our Spec-U equal length headers for the 2012+ Tacoma V6 that needs a final test fitting.

Anyone local to URD in Owings MD with a 2012 or later Tacoma V6 looking for a great deal on a set of AMAZING Spec-U headers?
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1 month ago

Now we are getting somewhere!!! ... See More

1 month ago

Our good friends at XRunnerUnderground.com are hoping that Toyota will bring back the XRunner for 2016. They put together some nice renderings of what it could look like. Lets hope Toyota brings it back with a decent transmission this time!!! ... See More

1 month 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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