I have had a player ask if there are any attachments that can be installed to increase system strain or to increase a vehicles handling.
After looking through the books released so far I can't find anything that would do this?
mods to boost system strain or handling?
Nothing in any of the books so far, no. Handling and System Strain Threshold are much more likely to be victims of reduction due to other unorthodox adjustments to a ship, which is kind of realistic, in a way.
Nothing in any of the books so far, no. Handling and System Strain Threshold are much more likely to be victims of reduction due to other unorthodox adjustments to a ship, which is kind of realistic, in a way.
Only, it's not realistic at all... people spend a hell of a lot of money to reinforce their cars, increase handling and speed. There's no reason why you couldn't.
For Handling I think the intent is not to allow a mod to improve it, but to present the best alternative as buying into a Spec with Skilled Jockey to negate the penalty.
Well the tail of a Cloakshape is in fact an aftermarket Maneuvering Fin attachment that is so common a lot of people thing it's standard.
So there's room for that upgrade, even if there's no official stats yet.
JoY has these very items, but for Silhouette 2 or smaller vehicles.
The Starship section for Attachments (EotE CRB 269) states clearly it's not every mod out there and encourages GM/Players to invent their own. (and that new ones will come out in upcoming releases, as we've already seen with DC and JoY).
Making a mod for handling would probably have a strain reduction cost. That seems in synch with things. Making a mod that increases Hull or Strain seems fitting too as you reinforce systems.
Really, the sky's the limit as you could do something like a power re-router mod for starfighters. Let them give a weapon Slow Fire to increase a shield zone by one (as most Starfighters don't have the CHP to put a 2 CHP shield mod in). Or to drain a shield zone to increase range and/or damage of a weapon system. The mod would be there to capture the old X-wing flight sim game feel.
You can balance mods by limiting their Sil. So if you want a Starfighter mod, just make it for Sil 3 ships. Maybe the rare scout ship could pick it up, but it removes the 'I don't mind if the Y-wing gets this, but it could be sick if the YT-2400 gets it' issue. Or flip it if thats an issue.
I suspect that either the Smuggler and/or the Technician career book will include more attachments and mods for starships. I can easily see something that improves the handling or system strain of a ship.
Here's a fan made supplement with exactly what you're looking for, on page 48 ad 49.
https://www.dropbox.com/s/j1nlpycdgvvr7lq/CartolsEmporium_%28v1.0%29.pdf
I've been using this supplement a lot, to good effect.
Nothing in any of the books so far, no. Handling and System Strain Threshold are much more likely to be victims of reduction due to other unorthodox adjustments to a ship, which is kind of realistic, in a way.
Only, it's not realistic at all... people spend a hell of a lot of money to reinforce their cars, increase handling and speed. There's no reason why you couldn't.
To clarify, I meant that it was realistic that doing things like adding thicker armor and more powerful engines would take a toll on handling and overall system strain.
In our game, my pilot character succeeded on a piloting check so well during a dogfight with some Imperial TIEs that (as per the suggestions under the Piloting (Space) skill description) my GM let the 5 extra successes allow my character hit upon a way to improve the handling of the ship.
I suggested that my character felt some familiar hiccups and sluggishness as he was evading shots - reminding him of how a certain trading scow he used to pilot handled...but that ship was equipped with Hydraulic Control circuits. Hmmm....
Our mechanic and my character chatted in game for a while, pulling ship panels and inspecting systems, debating as to why that might be.
With GM approval (and some triumphant Mechanics checks), we decided that our old freighter had indeed been fitted with Hydraulic Control circuits at one point - but that when it was upgraded not all the relevant systems had been checked fully - the ship was still feeding power into and through a whole series of outdated Hydraulic relay processors that were doing....nothing, really since they weren't hooked up to any maneuvering controls.
We got to work and unhooked all these processors, put the old lady back together and are now flying like a slightly less sluggish freighter. 
I made up a custom ship attachment for OggDude's character generator that explains what we did to the ship and that it increased handling. (Thanks again for the tool, OggDude!)
JoY has these very items, but for Silhouette 2 or smaller vehicles.
Oooohhhh, do tell.
Edited by lupexHere's a fan made supplement with exactly what you're looking for, on page 48 ad 49.
https://www.dropbox.com/s/j1nlpycdgvvr7lq/CartolsEmporium_(v1.0).pdf
I've been using this supplement a lot, to good effect.
JoY has these very items, but for Silhouette 2 or smaller vehicles.
Oooohhhh, do tell.
The gist of them is that you'll be able to trade handling and/or speed for system strain for sometimes negligible cost!
That's something else to look forward to then, my player has a speeder and a swoop that he wants to mod.