Is your muffler straight or angled? Did you get just the muffler or muffler + diff back pipe?

I'm wondering since a muffler swap can be as easy as undoing 2 bolts and swapping the mufflers around.
If there's no modification, you could do it yourself?

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MY99 WRX (Sold)
MY06 WRX 241hp 430nm atw (Sold)
MY09 BMW 135i 247kw atw (Current)