Because up to 94 and 2000+ use different NT motors than we do. Ours is a Chrysler built motor/trans, that clutch is for mitsubishi motors/trans.There have been prblems with centerforce by some. Clutchmasters is well liked, so is SPEC and motofool on the board here has custom clutches as well.15.9 @ 86.7mphInjen CAI, 55mm TB, P&P Intake, Crower Cams, Hooker Header, ERT/Catco Cat, GS-T Muffler, AFX UDP, Crane Ign Amp, S-AFC