How can i make my Lexus IS 250 faster?

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Tiger B

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How can i make my Lexus IS 250 faster?
what can i buy thats atleast under 300 bucks that can make my Lexus IS 250 faster.. Also the car has triptronic is it ok if i downshift or can that mess up my engine ?thanks in advance!
 
$300 is tough
1) Oil change to synthetic oil (Amsoil, Mobil 1, Redline, etc.) It won't get you much hp, if any, but will reduce wear. $50. It WILL let you at least go the full oil change interval, 7500 miles, vs. 3k for regular oil, so it is a breakeven on cost but less of your time.
2) K&N cold air intake, $40 for just the drop in filter, $150-200 for the full cold air intake, if made for you IS.
3) Keep tires at FULL rated PSI. The 30-35 psi on the door jamb is for comfort and noise, for max speed AND mpg, fill to the rated pressure on the tire (40-55 psi), cost $0, mpg:. +1-2 mpg. If too noisy and stiff, back off until you like it.

There is no such thing as a $300 supercharger - those are scams - electric fans.

YES, you can downshift - that is WHY it is there. It does NOT hurt the tranny and it has protection to keep you from overrevving. I use the paddle shifters on my IS all the time - usually when I am preparing to pass and want the lower gear to start with instead of waiting on the downshift.
 
please do us all a favor and drive like a normal human being!! SLOW DOWN!!!! to save gas and more important- TO SAVE LIVES!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
 
The triptonic should only be used when you used it from the get go.

Don't switch from automatic to manual. This messes with the computer for the ECU.

Also you can add a supercharger for about 300 bucks

If not that camshafts would be my next choice.
Start to build your engine from the inside out that way you can never hurt the motor.
 
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