You wrote me a check for $100 and the parts and shipping was about $75 or so. Plus you bought me lunch. If you are going to write checks in the wrong amount in the future, please make more meaningful mistakes.
A HUGE difference.
Bear in mind mine is a '91 with a restrictive OEM exhaust manifold. But the difference was like night and day. Really, that much. With no other engine mods the car dynos at 271+ rwhp.