if you got pix, show us please. I'm strongly thinking about replacing both UP and DP. oh well... i keep telling myself to wait till my rex break 5000 mi at least.
hey check out the airborne motorsports up and downpipes, they have really good install deals, and the quality is top notch
Up-pipe is the perfect first mod, and by far the most bang-for-the-buck of any basic exhaust modification you can do to the car.
In terms of feel when you're driving, absolutely. Throttle response with 5hp gain makes a lot more difference at the seat of the pants than 10-15hp does with sluggish spoolup. Hell, on a mountain road I'd rather have an otherwise stock WRX with an uppipe over a car with a turbo-back and a stock uppipe. Gotta get one with a flex joint though... solid ones are hit or miss.
Crappily built ones will affect airflow. Properly designed units (like the PDE) are sleeved inside and have no turbulence issues.
I'll get a quote for you, Richard. The up-pipe is $275, $300 even with the new OE crush gaskets. I'll get a price on labor for you.