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Originally Posted by Maxim
These are all good ideas. I might be ok with the idea of getting rid of the spare and replacing it with a tire patch kit and pump....though I hesitate to remove weight from the rear. Maybe replace the spare and tool kit with sealant and a pump....and relocate the battery to the rear?
I'm not sure that the exhaust and headers would save that much weight though. Maybe 40 pounds total if you did both? I'd skip the race pipe too. More compact, high-flow mufflers (or perhaps a conversion over to only one side with one muffler) would save a good 10-15 pounds and give the car a better sound.
How much weight does a WRX save by converting to single side with titanium components? That would give us a pretty good estimate for weight loss.
The wheels are probably the most important aspect to change....it really depends on how much the stock pieces weigh. Some cars are coming from the factory with damn good wheels now...the RX-8 R3 for example.
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No, my exhaust weight estimates are from other cars.. Stock exhausts usually weigh around 45-55 lbs due to cast iron construction, titanium weighs 11lbs. Big difference. Same with headers, stock about 25-35, titanium are 5-10 lbs. You pay big bucks for these kind of weight savings though. An exhaust runs for over a grand, and I'd be willing to say the headers would run 800 or more. However, theres a loss of 87 lbs in the exhaust system alone, as well as more power, more response, and some cosmetic appeal. As an engineer however it's just cool to have so much titanium in your car.