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3 minute(s) of a 643 minute read
5-26-2012
I picked up the SPT exhaust (again) today. Put it on and did an oil change. I really, really like how the flared tips look. I think the SPT, Nameless (small tips) and Greddy are the best looking exhausts. The single wall, straight cut tips just don't do it for me. The other rolled or double wall exhausts (that aren't quite as pronounced as the SPT) look OK, but I don't think as good.
I was also reminded how good the SPT sounds! It's very, very quiet at cruise. Close to stock. Definitely a lot quieter than the Q300. It is considerably louder than stock when you get on it, but not excessive. The tone is always deep and sounds great. I'm really happy to have it back on. Also good news is that baby loves it! 
While I had them off, I measured the stock vs. SPT midpipe. Stock is 2 1/4" and SPT is 2 1/2". SPT has the midpipe go straight into the muffler. Saves about a foot of piping and a 90 degree and a 180 degree bend. I'm assuming this would all add up to slightly better flow, but probably doesn't make that much of a difference (since cat back's don't really seem to matter).
5-27-2012
The SPT is the exact same between the STI and WRX (08+ hatch). Definitely not 3". None of them are (including the single exit hatch SPT). This is my second SPT, one came off a WRX and one came off an STI. Same thing. The exhaustactually flares out at the flanges and gets wider. The only 3" section is the few inches after the midpipe and before the muffler.
Here's the stock image. You can see it doesn't "neck down" at the flanges. 
Here's a couple new shots that I took today:
