Whats the difference

[LeadFoot]

Between a 1998 GTP and a 1999 GTP?

[blueguy]

The year or amount of doors?

Maybe the interior color or even the exterior?

MAF's are different in that year. Along with the airbox setups.

[Jomamma]

Not much, the coolant reservoir was moved to passenger side strut tower instead of by the air box.

[SlowNA06]

<- wonders what year they switched from platinum to iridium spark plugs.

[Iceman6669]

Blue IIRC the air box didn't change till 99.

[z3r0]

Right so the 98 will have the double 90 intake.the 99 will have the better intake

Android Fire

[LeadFoot]

Right so the 98 will have the double 90 intake.the 99 will have the better intake

Android Fire

Is this true for the GTX as well

[BillBoost37]

From 98 to 99 the visibile changes are pretty well covered above, so I'll add a couple of the standard manufacturing ones as well to make myself look good.

Maybe wheel changes
Maybe a couple different colors
Airbox
Coolant bottle
Maf sensor/TB

Behind the scenes though, there's tuning differences in the PCM. There are BCM and some sutle wiring/circuit differences where they found needs to upgrade/redesign.

[MoarkatsINmuhtrailer]

torque stars were introduced in 99

[Bio248]

torque stars were introduced in 99

And are lame.

Abs > tq stars

[LeadFoot]

From 98 to 99 the visibile changes are pretty well covered above, so I'll add a couple of the standard manufacturing ones as well to make myself look good.

Maybe wheel changes
Maybe a couple different colors
Airbox
Coolant bottle
Maf sensor/TB

Behind the scenes though, there's tuning differences in the PCM. There are BCM and some sutle wiring/circuit differences where they found needs to upgrade/redesign.

Any of those a reason to get a 99 gtx over a 98. Are there any performance advantages or anything.

[GTPGP98]

Don't forget the Dual Climate Control lighting changed from green '98 to red '99.

[Iceman6669]

Low tire pressure light... I believe only available on 97's