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Discussion on normally aspirated K-Series engine performance.
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Discussion on turbo and supercharged setups for the K series engines.
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General Smog Test Discussions

Here we collect all the information and questions regarding smog test and passing
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Fuel efficiency improvements

K-series engine improvements to increase the fuel efficiency: hardware, software and driving strategy
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Learn about the latest products out for K series cars and motors.
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K20a.org Swap Talk

1992+ Civic EG / DC2 / EK K-Series Swap

This is the place to post or ask questions regarding the K20A / K24A swap.
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2001+ Civic EP3 / RSX DC5 / EM2

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1988-1991 EF Civic / CRX K-Series Swap

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Honda Fit / Prelude / Accord K-series Swap

This is the place to post or ask general swap questions regarding the Honda Fit and its K series upcoming swap options.
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K-series powered Kit cars

The Ultimate K series Experience.
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K-Series Technical Forum

K-Series Transmission

Transmission specific K series forum
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J Series V6 Swap Forum

Honda J Series V6 swap general information
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Advanced Discussion Concerning Engine Theory and Design
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Discussion on K-series ECU and tuning
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Discussion on K series wiring and anything else electrical and/or electronic.
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All other Honda models K-Series Swap

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Discuss engine building issues.
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k20a.org Track and Racing Forum Want your company's banner here? Email us for rates

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Discussion about Drag Racing and Road Racing cars, theory, setups.
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Racing and Kills

Talk about any kind of racing involving K series or not! Want your company's banner here? Email us for rates
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Road Racing

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Acura RSX / TSX / Honda Civic EP3 / 2006 Civic Si

Discussion on native K series cars.
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8th generation Civics 2006+

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Vendor Deals

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CariD.com

Need to customize or repair your Honda Civic? Check out our selection of parts and accessories at CARiD.com, or give us a call at 800.505.3274 for professional advice.
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EBC Brakes

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Latest Posts See all new posts
  1. Hey all, I am transferring this thread over from another forum. Hoping for some good conversation here! Little background here before i get into it, I have 4 track seasons of experience so far, with 2023 being season 5. I started with my mazdaspeed 3 which i built more as a street car then...
  2. I’ve searched and searched and everyone says different things. Can anyone provide a definite answer to what axles Id need? K20z3 with 02-04 RSX trans and stock hubs. Thanks in advance fellas.
  3. All Motor K series Technical Discussion
    Hey all, I am in the middle of a teardown , unfortunately for the second time after a single test run. Thankfully no damage is noted. The issue is with my head. The machine shop I initially brought the head to improperly seated the exhaust valves. New machine shop is going to resolve it...
  4. Introduction Forum
    Hey all, happy to be here and get some further knowledge as I build my former daily into a track/weekend toy. Its an 06 TSX 6MT . -Nikko
  5. United States of America
    Hi everyone I've been trying to reduce the lock to lock ratio and I found this QUAIFE QUICK RACK & PINION KIT 2.83 but I don't know what I need to make it fit on a civic ek. I'm sure I'll have to remove the ps but I don't know which rack housing to use, they say it only fit the "SH3L" but I...
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