I have begun compiling a list of all the weights of the various stock parts of the car
Please PM Zoom44 or Brillo to add any additional information.

Base RX8 / cloth seats / no sunroof / fully fueled - 2960lbs

Hi Power Engine Fully Dressed (Flywheel but no clutch) less Airbox - 267.5lb (per Racing Beat)
Short Block with no attachments per MazMart - 184.0lbs

Stock Wheels (18'') - 21.5lbs
Stock Tires (RE040 18") - 26lbs (some users have reported 28lbs...need to check)

Stock Small Battery - 21.1lbs
Stock Replacement Battery - 37lbs
Lug Nuts - 0.3lbs
Engine Cover - 2.3lbs
Battery Cover - 0.7lbs
Emergency Tire Kit - 4.8lbs
Washer Fluid Tank (full) - 1.43lbs
Car Jack with Case - 6lbs
Bumper Reinforcement - 15.6lbs


Front Seat (power/leather) - 55lbs
Front Seat (cloth/base) - 37.5lbs (including sliders and mounting equipment)
Stock Catback Exhaust - 38.6lbs
Stock Cat & Midpipe - 23.2lbs
Stock Exhaust Manifold (with O2 Sensor) - 17.6lbs
Stock Intake System - 13lbs
Full A/C System - 18lbs

Stock Power Plant Frame - TBD
Stock Aluminum Hood - 15lbs

Stock Front Brake Rotors - 18.5lbs each
Front Calipers and Pads - 13.0lbs each
Stock Rear Brake Rotors - 12.5lbs each
Rear Calipers and Pads - 9lbs each

OE Front Shock Assembly w/ spring - 11.5lbs
OE Rear Shock Assembly w/spring - 12.5lbs

Endlinks front each 7 oz
Front sway bar 6.3lbs
Fog lights 1.2lbs
Oil pan with bolts 4.7lbs
headlight washer with hose 1.75lbs
4 brake dust covers 2.4lbs
Strut Front Bar 4lb

Aftermarket Parts:

Mazda Speed Exhaust - 33lbs
RX8 Store Cat - 11.31lbs
Greddy oil pan with bolts 6 LBS 1 oz

Intercooler piping with BOV no silicone couplings 7 LBS 0 oz

Greddy catch can 1.75lb

Greddy air filter 2 LBS

Interceptor X-EMS 3 LBS

Intercooler 10.6lbs

Turbo header with bracket 20.3lbs

Turbo *Greddy * 12.5lbs

Front racing beat sway bar 9.4lbs

Racing beat endlinks EACH 11 oz

Greddy strut bar Front 4.6lbs

Couplings with metal straps 3 LBS 0 oz

Greddy Front Strut Bar 4.6lbs

 

stock aluminum hood is 15 pounds, i weighted it when i replaced it with my CF hood.

 

New large capacity battery from Mazda 38lbs

 

stock intake including vdaf, but no air filter. 13lbs.

beers

 

My TSB upgraded battery just added an additional 16lbs?

 

The question was because I wasn't aware of the difference in size. I saw the original, but I never looked at the new one. Now I'm curious.

 

i could have sworn that the stock hood was 21lbs or so.

 

Wow, sweet collection going there guys. I bet getting lightweight 17s help a good little bit then huh?

 

I'm curious as to the size difference of the battery.

 

can I add? Base model 2880 lbs at empty light glow (3 gallons left in the tank).

 

Adding 12.9 gallons of fuel to get the curb weight gives just about 2960 pounds, which is what has been reported up top. Is our weight with or without the new heavier battery?

 

fyi, tirerack.com's spec sheet on the re040 says the 225/45/18 weighs 28 lbs. not 26.

 

per Bridgestone's website, they say 26lb, and since they make the tire I thought they would be the best source.

http://www.bridgestonetire.com/tires...r/index_bs.asp

 

i see your point, but i'd trust tirerack's data over a manufacturer's tire data. the tirerack's in a position to verify such data and manufacturers often embellish a bit. i guess we need someone to put a re040 on a digital scale.

it might also be a good idea to list the source of the weight data you supply for better transparency.

 

My RE040's are sitting in garbage bags under my deck waiting for spring (I couldn't afford both the snows AND new wheels for them in one shot). If I remember it I'll weigh one this weekend.

 

According to my digital bathroom scale (1/2 lb resolution) the RE040s are 27.5 lb. They don't have more the 4k miles on them, so wear shouldn't be an issue.

 

I noticed you didn't have the stock cat weight. Am I right to assume you mean stock cat/midpipe for that?

Anyways, I got 23.4 pounds when I weighed the stock midpipe.

 

Has anyone found out the weight savings for an aluminum radiator? Or is there any.

 

Don't think there would be a saving from a good aftermarket aluminum rad - the stock is also aluminum, plus the new one would have more tube area, more fins, and hold more fluid.

S

 

LOL, the entire A/C system from the firewall forward (engine bay area) is only 18 lb. including all the pipes/hoses, condensor, idler pulley assembly, A/C drive pulley, drive belt, and bolts. Mazda didn't leave much there, the pipes/hoses are amazingly light. Probably not worth it except for the most serious efforts, but it's already out now ...

should have the front cloth seat weights soon

I verified the OE intake weight listed, fwiw the air box insulator shield is 3 lbs for those who choose to leave it in place like for the Umnitza intake, it was included in the larger total weight number

edit: deleted a bunch of comments, not really appropriate to have general discussion in this thread

 

Only 18 pounds eh? That's kind of lame. I remember when I removed it on my 2nd gen rx7, so many people were quoting 50 pounds for the AC alone. Well after it was all out I weighed everything and it was about 23 pounds heh. Oh well, the AC system was dead anyways so I wasn't using it.

I figured the rx8 system would be light, and 18 pounds sounds about right. Maybe some day I'll take that plunge, I'm running out of the "simple" things to remove weight. I can live without AC

 

What do you think of braile batteries? 11-13lbs

 

why not install it(battery) in the trunk?

I'd be interested to know the weights of these items:

front rebar
airbags
steering wheel
trunk
stock shift ****
full antifreeze container

 

How much weight have you removed from the front? I know you have the titanium exhaust and I suspect you removed the jack, ect. Having a little more weight in the rear is not all that bad. In fact, it's better for traction imo.

 

Is this a dedicated auto x car or do you daily drive it also? No point in running duals unless it's for looks.