RSXiMUS

iTrader: (7)

Headers will come soon, I'm going to gut the factory primary cats and redyno to see what kind of gains we can see with the stock manifolds.

I told my wife the IS-F was going to stay stock....so much for that promise. LOL.

LexyISF

Very nice gains! I want to go the Borla cat back for the sound alone, but any gain is great!

Where did you pick yours up from?

itsmejon

I just installed mine, guess the butt dyno wasn't lying to me felt little more umph.

scamsel

sweet, you would knoW!

RSXiMUS

iTrader: (7)

Thanks, the sound seems to get better each day. It definitely toned down a bit in the loudness department, probably 2/3 as loud as the first day. No drone which I love.

I picked it up from Summit Racing, $988 shipped.

iH8RICERZ

iTrader: (3)

Awesome...glad to know that I went with the cheaper route as well and got some awesome gains! Thanks for this info!!!

4TehNguyen

iTrader: (1)

this engine needs help breathing at high rpm, thats why exhaust and headers have huge gains on the high end

Rickna

iTrader: (3)

I have a Borla on the way. Looking forward to it!

RSXiMUS

iTrader: (7)

Yes this beast of a motor is pretty corked up from the factory with 4 cats, it's time to unleash the primaries and go for 400whp.

I8ABMR

Thanks for posting this. I have been on the fence about doing an exhaust but this makes it that much more appealing. At least if I do the Borla I can save the $600 that the dealership will probably take for install. They are not cheap but they will fix any issues if need be and give me a 45k loaner car to go to work in. Dont have time to sit at shops........or any desire to do it either ( been there dont that)

NSXGuy

Any increase in gas mileage with the Borla?

dabs

$600 for exhaust install???

my lexus dealership charged me $50 for the install

OP, those are some impressive gains from the borla

RMA

Some sweet dyno runs, I had no idea a stock car w just a Borla was such a difference. When I took delivery of my car this past summer the car already had a Borla installed so I cant compare from stock & now. Adding PPE headers was just icing on the cake after that (no cats). Sounds great Borla/PPE if you decide on headers next, not too loud either just gives it a real nice growl. Congrats.

Kojak77

I'm up around 2-3mpg on the highway since the Borla install.

I'm down around town since I keep hammering the car so I can hear the exhaust.

LexISguy

Comparable gains as the Joe-Z.