Originally Posted by mconde01
Ok...so let me get this correct. I have an automatic transmission and I want some more punch and quickness when I press down on the gas. (and yes I understand that I will not be getting more HP) I heard that the 1st model was very aggressive and that the revised 2nd model is still aggressive but not as harsh. If this is the case then I want the revised 2nd model...can someone who knows what they are talking about elaborate for me? Thanks...
The sprint booster for the automatic (451A) MUST be used with the automatic and CAN be used with the manual as a 'lite' version. The 451 CAN ONLY BE USED with the manual as it is more aggressive and does not play well with the automatic transmission shifting. You will still get a 'kick in the pants' with the 451A and your automatic trans...as anyone from the first buy with the auto will attest.