I have a 2004 Mazda 6, and it's very annoying indeed that the revs are not matched on the down shift in manual mode (don't just tell me to buy a manual, the car was given to me, if it were up to me I would have). The ride is very jerky because of this, and I end up just leaving it in drive.

Is there some kind of aftermarket product or software or something that will auto-blip the throttle to match the revs on the down shift for me? Or will I have to keep it in drive for the rest of the time I own the car ?

 

no after market rev matcher, closest you can do is either feed it some gas when you down shift or wait till the rpm's drop lower to down shift.