Suspension will change up the feel of your car.
Without going too far out:
-Shocks/Struts (I would spend the extra $200 for adjustables)
-nonadjustable Lower control arms
-Upper adjustable control arms
-Adjustable panhard bar
-Camber plates (I'm not running it but others need it. Two shops measured my front both at -1.9 and -1.8 so it's still on the far end of being in within spec)
A little more far out and a couple thousand more expensive:
-cat delete pipes / high flow cats
-shorty x pipe if u go LT headers
You could go with a Cobra Jet Manifold but it'll require a few other parts that I'm not gonna sit here and spout out to you cuz I didn't do a CJ Manifold.
More power? Nitrous, supercharger, turbo kits.
Baby steps lol
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