IS 350 Sport-tuned suspension

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10-28-07, 11:28 PM

#16

i3urton

Lexus Test Driver

Join Date: Jul 2007

Location: ca

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humm eibach or lexus springs?

which is better the sports suspension or the eibach pro kit?

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04-03-21, 09:01 PM

#17

ELexis

Instructor

Join Date: Dec 2019

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Quote:

Originally Posted by carchitect

Sport suspension models also get a revised steering rack with a slightly different gear ratio (13.6:1 vs 13.5:1)

Understand this to be an older thread however, have been interested in installing the shocks / springs included with the ST / X packages.
After further research, it appears that the springs / shocks are the only different parts. Vehicles (06-2013) equipped with the ST / X / Luxury packages all us the same power steering ECU 89650-53020. Believe the steering ratio is the same as well. Unsure of steering ratios for the following however;
89650-53041 - 2010 - 2012 IS F power steering ECU
89650-53042 - 2013-2014 IS F newest power steering ECU
89650-53082 - 2011 - 2013 IS 350 with sport package. power steering ECU