SRX4...is AWD. Have a look under the frontend, you should be able to see halfshafts and boots out near the steering knuckle. Then look at the backend.
I like sixbangers, but mostly the 4.3 chevy/gmc truck version,,,it's a short 350 smallblock.
Not a lot of hi-performance stuff for the SRX's, 6 or 8. For a die-hard GM fan, a blower/head swap from a blown N* into an SRX/N* is maybe 'something'. A lot of work and likely '0' resell ability. First things, a complete fluid swap, good quality filters, hi-po brakes, and a first rate tune up. Maybe a dyno session to verify the thing puts down as expected, and, to verify any improvements later on
N*'s came with 18's, and the Sport wheels are 20's I believe. I do not know the exact interchangeability with the STS-V, the one with 6 lug hubs/wheels. The offset may be different. 2nd gen SRX is different bolt spacing than 1st. There is not a lot out there, less as time goes by.
Snagging good aluminum wheels at the local pickapart is a favorite game for me, $25ea with the tires. Must have got 2 dozen sets over the years. A little OCD on wheels.