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Originally Posted by V8toilet
Dang! 
Chances are that when they do if it's anything like the ones for the Tundra that it will just cost you a little low end torque in lieu of a few top end horsepower. They market the crap out of these things that they are cold air intakes as if the stock systems aren't but most of the time what people have is already a cold air intake system and they charge upwards of $300 for these pieces of junk.
The same goes with exhaust systems. I bought an $800 TRD dual exhaust system for my truck and it cost me so much low-end torque that I couldn’t spin the tires even in a turn but I could when I had the stock exhaust. I tried a JBA single Evol exhaust and it was better but I still lost a little low-end torque. The truck still felt stronger with the stock exhaust on. The JBA Evol exhaust was a 2-1/2” system and the stock system is 2-3/8”. The engineers put the perfect diameter exhaust tubing on these things for the best compromise between low end and top end and changing it, on a Tundra anyway, only hurts performance in the low end where you need it the most.
The best part is I bought a $99 Spintech muffler, cut the stock muffler off, and welded the Spintech muffler in it’s place reusing the stock 2-3/8” tubing. I did this trying to see if the engineers left some power to be gained at least in changing the stock muffler. With this setup I felt a seat of the pants improvement so to confirm that I dyno tested it on a Dynojet 248c. I ran a few times with the stock exhaust and than I ran with the Spintech muffler installed all on the same day on the same dynamometer for more accurate results. It showed that I gained 12 ft. lbs. and 8 horsepower with gains from down low up to the redline.
So you guys with your Titans might want to save your money and try some traditional hot roding and just swap out the parts that are most likely to be restrictive. With the exhaust system that would be the muffler and maybe the manifolds/ headers. I tested a K&N clone intake system against the stock intake system at the drag strip and I ran quicker ET and higher mph with the stock filter box than I did with that piece of noisy crap intake system. All that intake system did was make my truck sound like it had a four barrel carburetor on it. These trucks are so well engineered today that it’s very hard to make large gains with just bolt on parts. Often times the stock exhaust tubing diameter is the perfect size. I properly engineered single exhaust system makes just as much or more power than a dual exhaust system and its lighter and cheaper too. |
lets not go to far now. i put a dual outlet gibson on my little 4cyl s-10 and it spun the tires like candy. putting on a exhaust is not gonna make you loose such a drastic amount of low end torque and power that you cant even spin your wheels. did you dyno your truck with trd exhaust or just use the good ol butt dyno?
even if you took a exhaust off a 4cly you still could roast the tires off with no prob so a 8 not spinning tires is pretty hard to believe. same thing with your k&n, did you do a dyno with the stock intake then with the aftermarket intake? a dyno is the only way to see for sure. doesnt k&n dyno their intakes and give you a print out? testing a product at a drag strip doesnt prove anything sinces theres alot of factors that come into play.