ryan3v

got to 156 with a 99 gs400 just dropped in the SRT intake and engine mode. I couldnt believe it felt like the car had more just got a little spooked, by the feeling I had wings..... ( Red bull gives you wings and a gs gives you POWER) :D

I droppeed in the Infinity Kappa Perfect 10D VQ sub. I have to say that the sub made a huge difference. All I did was remove the old sub dynamat the back shelf dropin the new sub and was done. The diffference in bass is unbelievable. The Infinity sub is designed for free-air enclosures so it worked prefectly.

I just found a Infinity Sub that is free air. I will have it in in a couple of days, I will update you on the sound quality..

Well I knew that my 93 Gs300 wasn't the slowest thing out there, but I knew it wasn't the fastest either. So I pull up to a light and here comes a Sentra Spec-v. And we took off, except he was forever ahead of me. What can I do to my car to make it faster without it sounding too much different?? I wanna be able to at least be a sportier luxury car.

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Buy a GS400 B)

No really you should look a upgradeing the intake at the least. They range from 150-600 depending on you $ flow.

Thanks I will look for one.... I guess the next question is does anyone have a subwoofer for this vehicle that was taken out to be replaced by a aftermarket one. And is there a aftermarket sub that fits in, in place of the OEM smoothly???

Actually the next logical step would have been a bad subwoofer <_<

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you would think so but would a subwoofer cut the whole system out like that???

tire pressure shouldn't make a difference.  i would be looking at the quality of the wheel weight.  most likely, the shop is not cleaning the rim properly before applying the stick-on weights.  if the wheel is not cleaned then after a few days the weight is going to fall off.  also,  when applying the weights they need to be tapped ever so lightly with a plastic hammer to get the adhesive to bond evenly.  drive your cars to pgh and i will hook you up :D

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I am on my way were is PGH

I have a 1999 GS400 with the Nakamichi system and when I turn up the bass the system cuts out everytime the bass hits. If I turn the bass off I can listen to my music as loud as I want and it wont cut out. So in the process of troubleshooting I unplugged the amp from the subwoofer and I can pump the base up with no problem. So the next logical step I thought would be BAD AMP. But to my surprise this was not the case I got a amp off line and it had the same problem. Does any one have any idea what my issue may be. Either headunit, subwoofer or the everdreadfull bad wireing!!!!!!! please help

I have the exact same problem but have not replaced anything yet.  I just got some new yokohamas and the problem seems to be worse now at the same speeds as before.  Can warped rotors cause this problem - brakes pulsate when stopping btw?  Just wondering if I need rotors, re-balance, alignment, spacers, or all four done?????

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I just posted a thread and actually left this part out :( sorry I replaced my rotors and pads all around because I was haveing Bad shaking while braking also, but after putting on my new Brembo drilled and slotted :D rotors and pads I still had the 60 mph shaking

Good news for everyone!!! First a little bit of history. (( I bought my lexus GS400 with factory chrome rims that were chipping, so of course I replaced them with some hot new 17 inch rims. To my dismay about 500 miles later ( which was 2 days after I got the car) the steering wheel started shaking. So of course I took it to the nearest shop to have it looked at. They told me that the tires were out of balance and that the "rebalanced" them and I was all set. Well the same thing happened once again, after another trip to the repair shop I was told the same thing again. So with reason on my side I took my GS to my machanic which told me that I had a tire that was out of round. So what do I do..... replace my tires of course..... I get my new tires put on the car and after a little while I notice the same frigging thing is happening again... right around 60 the wheel shakes.)) Well I am sure all of that sounds very familiar to you if you are reading this tread... What i have found is, that if I keep my tire pressure all around right at 40-43 that the shacking is gone.. yeah this does mean that you have to check your tire pressure regularly but it does pay off. I have not seen the shaking in about 2 weeks now the longest I have gone since I bought the car a year ago.

My GS is doing the same thing also. I have replaced rims, then tires, re-tightened the luggs, checked airpressure and replaced brakes, still comes back in a day or two.