Toyota Tundra Forum

Often the question comes up: Will an aftermarket exhaust system make horse power or get better mileage?

I think of the exhaust system as a way to tune the power band rather than making more power or mileage. If you design a full custom exhaust you can usually gain power, but not so much with a catback. For most people it is a way to get a sound they like better.

On race cars we have used different exhaust systems on the same car to move the power band to better suit a particular race track. We spent hours on the dyno to tune exhaust systems on a stock car in order to get the power tuned to where we can use it based on the stock gearing and particular track.

We have designed full exhaust systems for race cars that involved understanding exhaust pulses. It was a lot of work and a system that was right for one race car, did not do the same on another identical car.

On the Tundra I went with the DT Shorty Headers and Zoomers Exhaust not for power, but for a better (lower) torque curve for towing our race trailer.

Here and here are some pretty good explanations on how and why exhaust system work.

__________________
2007 Tundra 5.7, Double Cab, SR5, Blue Streak

TRD (stickers removed), de-badged, Volant Intake, Zoomers exhaust , Doug Thorley headers, Leer 100R, Bedrug, Curt front mounted hitch, Sirius interface kit, Tekonsha Prodigy brake controller, OEM alarm activation, Wet Okole seat covers, Stubby Antenna, Folding Rear Seat Mod for Double Cab, Unichip,
Carriage Works Billet Grille

That's a fact. If you go to exhaust websites like Banks and check out the Dyno results you'll notice that most Cat-back systems increase HP but do so by moving the peak HP up the RPM range which is the complete opposite of what you need when towing and hauling. In most cases you're better off keeping the stock pipes and just replacing the muffler to get that sound you want without loosing the low end grunt.

Great subject!

__________________
Good Gawd Squid that is one ugly Tundra.

is there a way of making it a dual exhaust doing only the muffler, without doing a full cat back system?

__________________
2009 Black on Black Tundra
Double Cab, TRD Off-Road Package
5.7 V8 6 Speed
-K&N Cold Air Intake
-Alpine w505 touchscreen dvd/nav,alpine surround sound and 13" low depth soundstream stealth subwoofer
-hood and window deflectors
-PIAA 4000k low beam bulbs
-ArmorThane Spray in bedliner
-truxxx 3/2 leveling kit
-toyo open country m/t 275/70(33.6x11) on 18" trd wheels

mods soon to come:
-trd exhaust
-custom black leather with black suede headliner

future mods:
-trd supercharger kit

offcourse there is. you can just split the pipe.

it will be a custom welding project, but when it comes down to exhaust pipe nothing is impossible.