Thanks everyone for the input. So I think the exhaust and forged aluminum wheels would be the first choice for weight reduction.

Now they did say, the BRZ STI will have carbon roof and maybe carbon hood. But, wonder when the BRZ STI will show up.

That was just for the concept at the LA auto show. Would be nice if it actually makes it to the production model Sti.

I think I'm going to keep the back seats only for storage purposes. I need some where to throw my jacket and books.

The car already has an aluminum hood and roof...CF versions will save a few pounds, but might even add weight (most CF hoods have a glass backing... on the 04-06 STI/03-05 Evo a CF hood weighs considerably more than their OEM aluminium hoods).

Considering how light this car is (relative to all other modern cars with all the same safety items), in order to accomplish any further weight reductions (beyond wheels) you'll have to start deleting convenience items (radio/hvac/airbags/carpet/panels/glass).

Here is a good list of obvious easy weight reduction:

-exhaust
-wheels
-suspension
-spare tire/jack
-misc plastics (motor cover, etc.)

Next level:
-sound deadening from interior
-firewall mat
-undercoating from chassis

Next level:
-replace with FIA approved racing seats (illegal in US to remove side airbags)
-remove front airbags (illegal in US) racing steering wheel.
-remove rear seats, carpet, interior
-install cage and proper harness for seats


anything above that level is getting beyond street car level IMO. Even the racing seats are borderline. If you remove the side airbags, and then get in a wreck, the insurance company can deny your claim due to modification of the safety system.

Also remember, removing rear seats, or any weight for that matter, automatically puts you in the SM class for autox. SM can have engine swaps, turbos, etc. Big modifications! If you want to actually have fun in competitive driving, keep your interior in tact!

Don't forget to replace the heavy battery...I think it is at least 35 pounds. There are good 3 pound lithium ion batteries....for less than $300....

More importantly is lowering springs. Then this car will very nearly have the lowest COG in the world. Main reason its not already is the ride height.

back seats from the factory mean less $$$ on insurance. not planning to do any real weight reduction mods (maybe except for wheels and CSL style trunk lid made of aluminum/CF). this car is already fairly light weight for what it is amongst new cars.

MY GOD the ghetto shit people do to cars!

if done right it looks good....

http://www.rearseatdelete.com/mustang/0509/05RSD1.jpg


I am going for this look myself

^^ That looks like shit.

Because it is in a tan interior (which neither the FR-S or the BRZ) will have, I didn't dig through the whole site to pick a black on black it gives the idea of a seat delete. :thumbsup:

here's a darker picture

http://www.rearseatdelete.com/mustan.../182_lower.jpg

I just don't understand the reasoning.

I'm going to replace 2 pieces of foam, with two pieces of wood?

There is no weight savings.