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Looking for som advice/recommendations. CEl on car Multiple misfire, p0300 codes. Changed spark plugs. Issue persists. Next step is fuel pump? I'm wanting to use DW400, A BAP and some gt500 injectors. Then get a better tune than the roush one. End goal is probably about 800 whp Advice is...

I was working under my car and noticed what I think is a small exhaust leak. No clue exactly what all this is. Can anyone identify what my current setup is? This car is a Roush stage 2. Another question is what parts should I use for repairing the section that's leaking? Don't want obnoxiously...

I picked up a 2015 Roush Rs2 mustang. Seller claimed 750 hp. Not sure if this is at the flywheel? Or at the wheels. I'm not a tuner, never owned a mustang or a aftermarket boosted car. Took the car in this morning to get a baseline on the dyno! Well on the drive there the car lost about a Honda...