Kia is still out and about testing its facelifted Stinger. That's the sporty liftback sedan that may not be able to compete with the likes of BMW and Mercedes-Benz on badge cachet, but which gets closer to them than you'd think from behind the wheel. We've seen a few spy photos of the updated Stinger previously, and now, another one has popped up. This time, the anticipated Kia has been spotted sporting even bigger quad exhausts.

And we really do mean bigger, as a side-by-side comparison (below) between this latest picture and previous spy photos show a marked difference. It may be that Kia is keen to show off the updated Stinger's extra grunt, as the range-topper's 3.5-liter is expected to make 380 horsepower, up from the current V6's 365 horses.

According to a report from The Korean Car Blog, the front of the car - we've only seen glimpses of the headlamps in various spy photos - won't be massively different from the current model. This is no bad thing since the Stinger has a smart, aggressive appearance that really hasn't aged at all. The report also noted other changes over the current model, such as a different wheel design.

There is more to take in at the back, with taillamps that light up towards the middle of the car. The camouflage cutouts make it tricky to tell if it's a continuous light strip or individual lamps, but either way, it's a big departure from the current model's design.

Along with the range-topping 3.5-liter, a 2.5-liter turbo with 304 hp will also be offered, which is plenty of power for shoppers who can't stretch to the pricier V6. With the range-topper's extra grunt, though, it should be a bit of a beast in a straight line, since the current V6 already gets to 60 in comfortably under five seconds. That's right up there with the likes of the BMW 440i Gran Coupe. We hope the new model sounds as good as the current one, and to make sure that those new, shouty tailpipes are more than just for show.