IS 500 aftermarket exhausts
#136
Instructor
#137
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The headers look to have added around 50 hp though!
#140
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This is quite common with Natural aspirated engines. I have seen this happen time and again even with the older Bmw M's when they were naturally aspirated. Turbo's and superchargers fare a lot better with a similar setup.
The runs are SAE corrected for any temperature and humidity changes. Dyno's were run on the exact same dyno each time. 3 runs every session.
Yes, headers is where the big gains are achieved. What was amazing to observe with the dyno is how the headers even without a tune made the torque and horsepower curves so much smoother with less severe dips. In stock form you see how much the torque and HP were undulating through the RPM range.
#143
Racer
iTrader: (1)
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after seeing the graph, it makes me not want to get an exhaust...haha. maybe just change out the mid pipe and keep the stock axel back? indeed the headers did real good though!
@konichiwa3 do you not have an intake system? if not, why not?
@konichiwa3 do you not have an intake system? if not, why not?
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#148
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