engines

is there a engine with more power we could use, the new 300c, hemi, or the magnum, cross fire. Are there any parts we can upgrade? cams, pistons, cat back, turbo. So far i have gotten a aftermarket exhaust put on, sounds sweet, custom cold air intake, falken shoes, performance sub sound system,5% window tint, am putting the 300m auto shifter in and a lot more to go.

Unfortunatly, there is no easy engine upgrade past the 3.5L. Nothing else will bolt up to our transmissions. In the 300C you have the 2.7L or the 3.5L with essentially the same trans as our cars, just adapted for rear wheel drive. Or the HEMI, which has a all new 5 speed auto which won't fit on the V6's

You can check here for easy performance upgrades:
http://dodgeintrepid.net/forums/showthread.php?t=24020

and here:
http://www.dodgeintrepid.net/forums/faq.php?faq=new_faq_item_1stgen#faq_1gstepsfaster