These will help me a lot! I have been trying to figure out a way to make these vans more powerful and I want to put a complete clip ( k-frame,towers ,engine,trans and side frame in the back to make it twin engine. I have a 99 grand caravan 3.8 and it will do 16.5 sec quarter mile and tops out about 130 mph cold air intake with high flow filter,platinum plugs and 2 1/4 stainless high flow exhaust. I wont be able to improve the top end much but it should get there mighty quick. Thanks again.