Have a 2007 gs350 and I'm torn between f sport exhaust and hks hi power. Also would like to know whether f sport or k&n air intake is better

 

F-Sport Exhaust sounds better imo, aggressive but tuned nicely. The HKS hi power is louder but the cans are very generic looking. Depends on how much sound and attention you want. F-Sport intake uses a dry filter and IIRC k&n uses an oil-based filter. Too much oil and you can mess up the MAF sensor. I'd personally go with both the F-Sports!

 

+1 I agree with MESCA'

 

Can't tune = waste of mod IMO . Just noise no gains. + running hella lean IMO