# Slotted sub-frame collars? **URL:** \ **Category:** Canada Nissan Automotive\ **Created:** [May 17, 2006, 7:20pm UTC](https://forums.speedlife.net/t/slotted-sub-frame-collars/142561 "2006-05-17T19:20:51Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![TravyPoo](https://avatars.discourse-cdn.com/v4/letter/t/838e76/32.png) [@TravyPoo](https://forums.speedlife.net/u/TravyPoo)\ **Post date:** [May 17, 2006, 7:20pm UTC](https://forums.speedlife.net/t/slotted-sub-frame-collars/142561/1 "2006-05-17T19:20:51Z")
I ordered a set of slotted sub-frame collars for my 240. i was wondering how hard these are to install, as well as how much of a difference will be noticed once installed? ---
**Author:** ![geniusevil](https://avatars.discourse-cdn.com/v4/letter/g/e36b37/32.png) [@geniusevil](https://forums.speedlife.net/u/geniusevil)\ **Post date:** [May 17, 2006, 8:12pm UTC](https://forums.speedlife.net/t/slotted-sub-frame-collars/142561/2 "2006-05-17T20:12:03Z")
those subframe bolts are on real tight, i had to use an impact, its alot easier if you have acess to a lift you will notice improved handling along with more noise and vibration coming from the rear ---
**Author:** ![1mns13](https://avatars.discourse-cdn.com/v4/letter/1/8491ac/32.png) [@1mns13](https://forums.speedlife.net/u/1mns13)\ **Post date:** [May 17, 2006, 9:49pm UTC](https://forums.speedlife.net/t/slotted-sub-frame-collars/142561/3 "2006-05-17T21:49:08Z")
The slots make life easy. ---
**Author:** ![GRIPPY](https://avatars.discourse-cdn.com/v4/letter/g/ad7895/32.png) [@GRIPPY](https://forums.speedlife.net/u/GRIPPY)\ **Post date:** [May 18, 2006, 9:47pm UTC](https://forums.speedlife.net/t/slotted-sub-frame-collars/142561/4 "2006-05-18T21:47:26Z")
Ya these are not too tough, took me about an hour to install. Just make sure you lower jack slowly after bolts are undone so that sub frame does not completely come off of bolts mounting it to car. Then just as easy as sliding them in, and jack it back into place, bolt back on and away you go.