Hi guys,
I am looking for a dual exit exhaust that does not drone on freeway... want something quiet.. just a little bit louder over stock... any recommendation? Is HKS Hi Power a good choice?

 

Tanabe touring

 

Tanabe Medalion Touring (I have this) or a Mugen Dual Exhaust. Both are a little bit quieter than stock and offer little to no drone.

If not those, just UK mod your stock exhaust. Cheapest solution and sounds great.

 

Tanabe medallion,fuji,and mugen that's about it. 90 percent of aftermarket exhausts will drone but there's only a few that wont like these.

 

The HKS Super Sound Master also does not drone, but it costs a great deal more.

 

Tanabe concept G. One of the top 5 best quality sounding exhaust for this car. No drone at all with a TP(not sure with) quiet at cruising and get on the gas and has a great presence as it should. Doesn't sound obnoxious or ricey at all, just proper for the car.

 

I don't know the Tanabe Concept G but can testify the Tanabe Medalion Touring dual fits your criteria. I have this on my car behind a Berk 63.5mm high flow cat which may allow a little more noise than the OEM cat. These are 60mm exhausts and the 63.5 mm high flow cat is the right one to use. Tanabe claims "under 93dBA" for both systems although I fail to see how the small Concept G mufflers can do this. My Medalion Touring behind the Berk cat measured under 94dBA on my OSHA certified noise meter and +/- 1 or 2 dBA is normal.

These are 4 part systems so the install is easy after soaking all the bolts in PB Blaster over several days. Watch the Mighty Car Mods S2000 exhaust install video where they install the (horribly loud) Invidia Q300. Start dropping the exhaust at the mufflers and work forward.

BUT try to hear any exhaust you're considering on someone's car! I depended on dozens of comments here that the Invidia Q300 was just a bit louder than stock or "not that loud" and in only a couple of weeks had to remove it from my car (and a buddy's as well) to avoid wearing hearing protection in the car and to keep my neighbors from attacking with touches and pitchforks! Only the pitchforks is a slight exaggeration.

-- Chuck

 

Since the edit function remains dead:

The Invidia Q300 measures 105dBA on my car. If your employer put you in this much noise you'd be required to wear double hearing protection similar to muffs over ear plugs.

-- Chuck

 

How was these measurements done Chuck, WOT driveby at 6krpm+ or standing still revving?
Milltek does a pretty quiet dual system as well, I got one laying in my garage waiting for install

 

There's a protocol for measuring exhaust noise. It's a stationary test at 3/4 WOT. 6000 or 6750 for our cars. See this link to the California standard which (I believe) is pretty standard way to measure the noise. There are diagrams linked in the link.

For the link-challenged here's the executive summary (emphasis added):

-- Chuck