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Kolak Performance Exhaust Systems

Here it is, folks...a High Performance High Flow Exhaust system for your Wrangler, Cherokee or Grand Cherokee.  The exhaust guru "Master Nick" at Kolak Performance has put together the best flowing componentry to create GOBS MORE midrange and upper end torque from your Wrangler, Cherokee and Grand Cherokee, possibly saving you a full second in a 1/4 mile, and lots more passing speed on the highway (and particularly useful when passing on 2 lane highways, as you can imagine).  When you are done with the Y pipe install on the cat and back system, it should look like the photo on the right. 

We go with a 3" exhaust from the Y pipe back, and using the highest flowing Hi-Flow Car Sound Brand converter they make (greater than 50% additional flow over stock cat), a Hi-Flow Flowmaster brand muffler tuned to your tastes (25% greater flow than stock muffler), and a mandrel-bent tailpipe that carries your stinkies from the muffler over the rear axle without kinking like the factory pipe (and many aftermarket "cat-back" manufacturers) do.  We've found that the 5.2L and 5.9L V8s flow and sound best with 3.0" and the Flowmaster 50 series muffler, the 4.7L V8s flow and sound best with 3.0" and the Flowmaster 70 series muffler (unless you have an '04+ with pre-cats only, which a Magnaflow wide-body is substituted for more noise cancellation due to the main cat not being there), and though 6 cyl. models have been tested with 3.0" and we found that they have better performance with 2.5" and Flowmaster 70 series mufflers.  (If you get a muffler that is too loud, it will resonate and sound "cheap", which is why we spec these specific mufflers for each engine.  Trust us on this. :-)  Just to illustrate the unbelievable amount of engineering that went into the factory system, here are a couple of photos of one of the factory downpipes:

This package is available now for all '93-'98 Grand Cherokees, as well as the 4.0L I-6 Cherokees and Wranglers. (if you have a 4 cylinder, ain't nuttin' I can do to help 'ya!) Install time for headers varies (probably 4-6 hours), but the rest of the stuff is easy for an exhaust guy to do (there is some piping that needs to be custom bent by an exhaust shop...that and the install itself should run you about $150).  It's a very noticeable gain in mid and full throttle acceleration times, particularly when passing on narrow 2 lane highways.

The Liberty KJ also now has a kit now.  Because there is no header manufacturer so far that I'm aware of, and because the rear tailpipe is already 2.5" stainless steel, there is now a kit offered with a better flowing Magnaflow muffler and the same Hi-Flow Catalytic Converter as the Grands and Cherokees get.  You should see a performance increase of around 15hp and a more powerful passing gear due to the exhaust system actually letting the stinkies out of the engine rather than backing it up with the stock restrictive cat and muffler.  I really think you'll be happy not only with the performance increases, but with the more "manly" sound that you're Libby will now make, rather than the effeminate sound it makes now, lol.

SPECIAL NOTE: Every now and again one of our customers has difficulty getting their local exhaust shops to install one or more pieces of the componentery included in the Kolak System.  Bearing in mind that we've tested just about EVERY permutation of exhaust systems for these Jeeps and KNOW WITHOUT A DOUBT what works best on these rigs, (and furthermore have had a 99.9% "approval rating" on these systems), every now and again some self-proclaimed exhaust expert will tell you that you don't need one of the parts or you need to purchase something else that we didn't send you.  Typically, it's all about selling you some stuff that you didn't originally buy from them to bump up their profits, but every now and again they are just plain poorly informed and haven't done the tests we've done.  If they give you a hard time and try to talk you out of the system, just leave and make an appointment at a PERFORMANCE-minded exhaust shop.  In fact, when you are making your appointment, call up your local speed shop and ask them who THEY recommend for getting exhaust systems installed.  It will likely save you some hassle later on.

YET ANOTHER NOTE: Your exhaust installer may need to cut and fit the tube in order to fit it on your particular rig.  There is also some additional pipe that should be kept on hand for fitment.  PLEASE DO *NOT* ATTEMPT TO INSTALL THIS SYSTEM YOURSELF UNLESS YOU ARE AN EXCELLENT WELDER, HAVE A SEGMENT EXPANDER, AND HAVE DONE *LOTS* OF EXHAUST WORK IN THE PAST!!!!!!

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