# HUD into fastback **URL:** \ **Category:** SON240sx Automotive\ **Created:** [July 7, 2010, 6:56am UTC](https://forums.speedlife.net/t/hud-into-fastback/157510 "2010-07-07T06:56:16Z")\ **Posts on this page:** 13\ **Page:** 1
**Author:** ![f\_r-bluntman](https://avatars.discourse-cdn.com/v4/letter/f/b2d939/32.png) [@f\_r-bluntman](https://forums.speedlife.net/u/f_r-bluntman)\ **Post date:** [July 7, 2010, 6:56am UTC](https://forums.speedlife.net/t/hud-into-fastback/157510/1 "2010-07-07T06:56:16Z")
when swapping the dash from a coupe into a fast back with the HUD will it all just plug in and bolt up or will i have to run wiring and cut out the old harness??? ---------- Post added at 07:56 AM ---------- Previous post was at 07:23 AM ---------- also the reflector on the windshield would that have to be swapped as well or will it reflect on the reg. windshield???[COLOR=“Silver”] ---
**Author:** ![spd-dmn](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/spd-dmn/32/5513_2.png) [@spd-dmn](https://forums.speedlife.net/u/spd-dmn)\ **Post date:** [July 7, 2010, 7:32am UTC](https://forums.speedlife.net/t/hud-into-fastback/157510/2 "2010-07-07T07:32:28Z")
you need the coupe’s cluster sub-harness (the sub-harness bridges the cluster harness to the main harness) hud will reflect on the regular windshield … not as well, but it will ---
**Author:** ![bing](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/bing/32/7211_2.png) [@bing](https://forums.speedlife.net/u/bing)\ **Post date:** [July 7, 2010, 8:23am UTC](https://forums.speedlife.net/t/hud-into-fastback/157510/3 "2010-07-07T08:23:33Z")
it works fine on a regular wiindsheild imho… a couple s1dc guys have this. i have a HUD sub harness available if needed. ---
**Author:** ![f\_r-bluntman](https://avatars.discourse-cdn.com/v4/letter/f/b2d939/32.png) [@f\_r-bluntman](https://forums.speedlife.net/u/f_r-bluntman)\ **Post date:** [July 7, 2010, 8:35am UTC](https://forums.speedlife.net/t/hud-into-fastback/157510/4 "2010-07-07T08:35:52Z")
so once i take out the dash from the coupe, ill have to cut out the harness and join it to the harness on the fast back or just change out both harness’s ? ---
**Author:** ![spd-dmn](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/spd-dmn/32/5513_2.png) [@spd-dmn](https://forums.speedlife.net/u/spd-dmn)\ **Post date:** [July 7, 2010, 8:50am UTC](https://forums.speedlife.net/t/hud-into-fastback/157510/5 "2010-07-07T08:50:47Z")
no cutting you need a digital cluster, a digital cluster harness, and a digital cluster sub-harness these 3 things replace your analog cluster, analog cluster harness, and analog cluster sub-harness respectively the digital sub-harness plugs into the same two connectors on the main harness that the analog sub-harness is currently plugged into ---
**Author:** ![vendetta87](https://avatars.discourse-cdn.com/v4/letter/v/b487fb/32.png) [@vendetta87](https://forums.speedlife.net/u/vendetta87)\ **Post date:** [July 7, 2010, 3:08pm UTC](https://forums.speedlife.net/t/hud-into-fastback/157510/6 "2010-07-07T15:08:04Z")
so that makes it plug and play… Hmm thats tempting haha is it just your speed that displays? or rpms too? ---
**Author:** ![forrory](https://avatars.discourse-cdn.com/v4/letter/f/6de8d8/32.png) [@forrory](https://forums.speedlife.net/u/forrory)\ **Post date:** [July 7, 2010, 7:05pm UTC](https://forums.speedlife.net/t/hud-into-fastback/157510/7 "2010-07-07T19:05:32Z")
Just speed in mph or kph. ---
**Author:** ![f\_r-bluntman](https://avatars.discourse-cdn.com/v4/letter/f/b2d939/32.png) [@f\_r-bluntman](https://forums.speedlife.net/u/f_r-bluntman)\ **Post date:** [July 7, 2010, 9:47pm UTC](https://forums.speedlife.net/t/hud-into-fastback/157510/8 "2010-07-07T21:47:09Z")
sweet!!! im going to do this, this weekend if its that easy. ---
**Author:** ![89\_coupe](https://avatars.discourse-cdn.com/v4/letter/8/e0b2c6/32.png) [@89\_coupe](https://forums.speedlife.net/u/89_coupe)\ **Post date:** [July 8, 2010, 3:19pm UTC](https://forums.speedlife.net/t/hud-into-fastback/157510/9 "2010-07-08T15:19:40Z")
ive got 2 hud clusters. one sohc and one dohc. (both dont work but you can tinker with them) projector with harness and 2 sub-harnesses ---
**Author:** ![f\_r-bluntman](https://avatars.discourse-cdn.com/v4/letter/f/b2d939/32.png) [@f\_r-bluntman](https://forums.speedlife.net/u/f_r-bluntman)\ **Post date:** [July 10, 2010, 9:58am UTC](https://forums.speedlife.net/t/hud-into-fastback/157510/10 "2010-07-10T09:58:46Z")
dose the cluster need to be from a sohc in order to use cause the coupe is dohc and the fastback is a single cam, or dose it matter??? ---
**Author:** ![89\_coupe](https://avatars.discourse-cdn.com/v4/letter/8/e0b2c6/32.png) [@89\_coupe](https://forums.speedlife.net/u/89_coupe)\ **Post date:** [July 11, 2010, 9:04am UTC](https://forums.speedlife.net/t/hud-into-fastback/157510/11 "2010-07-11T09:04:58Z")
if the engine is a sohc then you need a sohc cluster. and the same for dohc ---
**Author:** ![f\_r-bluntman](https://avatars.discourse-cdn.com/v4/letter/f/b2d939/32.png) [@f\_r-bluntman](https://forums.speedlife.net/u/f_r-bluntman)\ **Post date:** [July 11, 2010, 9:52am UTC](https://forums.speedlife.net/t/hud-into-fastback/157510/12 "2010-07-11T09:52:03Z")
whats the difference??? ---
**Author:** ![89\_coupe](https://avatars.discourse-cdn.com/v4/letter/8/e0b2c6/32.png) [@89\_coupe](https://forums.speedlife.net/u/89_coupe)\ **Post date:** [July 11, 2010, 10:41am UTC](https://forums.speedlife.net/t/hud-into-fastback/157510/13 "2010-07-11T10:41:44Z")
wiring for the tach is different i believe