If your Sentra SE-R feels slushy on hard launches or the engine rocks too much under acceleration, this Prothane insert is a simple, affordable fix. It's a red polyurethane bushing that goes into your factory front motor mount, filling the empty spaces in the soft rubber to drastically reduce engine movement. Polyurethane is way stiffer than stock rubber, so you get less wheel hop, sharper throttle response, and a more connected feel—without the harsh vibrations of a solid mount. The 14-504 is made specifically for the 2002-2006 Nissan Sentra SE-R (and likely other B15 platform cars). Installation isn't too bad; you'll need to support the engine, remove the front mount, press out the old bushing (or in some cases just drop this insert in), and bolt it back up. The precision fit means it won't mess with your alignment or cause weird noises. It's one of the best bang-for-your-buck mods for a front-wheel-drive performance car. Stiffen things up and put the power down better.
