Sell it and buy a 3 liter for the same or less money. Mine cost me $525 delivered with 23,000 on the clock.
If that's not an option, buy all of the bolt ons you can. Nothing you can do to the engine itself really without major supporting bolt on mods needed down stream. SVT TB and intake manifolds would be a great start, gutting the pre cats is also an easy option while the engine is out. Of course you need all new plugs and wires too.
Brad Noon
'99 SE MTX
3 point oh my God H.O. 179HP/178TQ
BNMotorsports Floormats, powder coating, TB optimizing, Gutted cats, etc
BNMotorsports is now the preferred distributor of Contour/SVT/Mystique Indiglo style gauges!!!bnmotorsports@msn.com