I'd have to go with TopSecret engineering. Their work just amazes me everytime. I'm mostly familiar with JDM tuning companies anyhow

I would say MINES since they work on evos and evos rule?!? haha

You do realize that your going to get as many answers as there are tuners

^thats the point, to see what other great tuners are out there...oh yea...some factory tuners i respect...
Brabus and AMG

ralliart! ftw

who makes the the fastest street cars on the planet.. oh yeah, Lingenfelter. I also think the work AMS does is just amazing.

RNR!

Umm... but seriously, I would go with RE Amemiya or JUN or Top Secret

So many to choose from, but those would be my top 3.....behind RNR of course.

I'd give honorable mention to Mines too..

oh cant forget the domestic bad boys...

LPE and hennessy

Mines. Extremely well built cars that can easily be daily driven.

umm... JUN, TopSecret, R.E. Amemiya, Spoon, HKS, AMS, Bucsher, RalliArt, TRD, SeanIvey, Mines, Tomei, Vishnu.... and Me(I keed) lmao

Ruf

^yes!!! RU to tha motha fnckn Ffffff..... RUF......... and also Ronin, Dinan, Cobb, Nismo and Pinninfarina......... and AMG... and Cosworth!!!!!!!!

Techart, Gemballa, Novitec Rosso. Along with RUF, Brabus, etc.. the list could go on and on and on.

So many to choose from.

I was limiting it to US and JDM tuners, but gotta give some love to the Euro crowd too.

"Rice factory" best eva!

Cant forget hollywood and the fast and furious crew. I mean they basically built 9 and 10 sec cars with bolt ons remember