I'm a new/used 2010 Santa Fe owner. I just bought the car with 35K miles and has been well taken care of.
It is the 3.5L V6 MPI DOHC 24V
I would like to put and aftermarket muffler on it later for better sound.
Also what else to improve performance?
Any suggestions?
Thanks...

 

Improve performance? What performance? Speed? (it's an SUV, not a Corvette). Off-road ability? Fuel economy?

 

Okay... This SUV runs very nicely...

 

You must have one of the 4 Cylinders....
This 3.5 L, 276 HP with Dual Overhead Cam is a good running engine.
My 98 Z28 300HP out of the factory...

 

Horsepower is one thing, torque is another. So is body, center of gravity and weight.

Actually your '98 Camaro Z28 is rated at 305 HP, not 300. That's a 29-hp difference between it and the Santa Fe. But torque is want moves a car. Your Camaro is rated at 335-ft/lbs of torque at 4000-rpm. The Santa Fe only has 248-ft/lbs of torque at 5000-rpm. That's a whopping 87-ft/lbs of torque difference.

Lastly, the Camaro weighs only 3400-lbs, the Santa Fe weighs 4100-lbs. 700-lbs is a huge difference. Plus, the Santa Fe is a tall SUV with a high center of gravity.

Bottom line, if you want "performance" to be speed, drive your Camaro.

Now, if you would like to increase the Santa Fe's off-road "performance" or fuel economy "performance" let us know.

 

Your right. I do like this Santa Fe though and it will get out of it's own way. ( especially if the A/C is off.)