i have a set of almost brand new greddy rocker arm stoppers...these are a great insurance policy for your sr20det and are quite easy to install. i upgraded my entire head/valvetrain so i'm not really worried about slining a rocker arm anymore but for those of you with stock heads...you NEED this upgrade. i can walk through install (it's seriously super easy) or do it for you for a small fee. price is $75 obo...call me @ 757-287-9689.