In our continuing effort to provide the very best selection of OEM and aftermarket parts for your Porsche, Pelican Parts staff recently met with the manufacturers of GHL exhaust systems. GHL makes mufflers and headers for 1978 and later 911s through 996, Turbos and Boxsters, as well as 944, in various configurations of inlets and outlets. They are currently developing headers and muffler for the 914-6. All of their pieces are made from top-quality 304 stainless steel, beautifully TIG-welded, and highly polished. (Figure 1) Their products are shipped with the necessary clamps, bands, and gaskets to complete the installation. (Figure 2) GHL proudly backs all of their products with a lifetime warranty. I have tried several exhaust systems on my Porsches over the past 30 years, and always wound up taking them off and putting the stock system back on for one reason or another. Usually it was because they sounded buzzy or raspy, or were just too loud. This is the first system that I would rate as outstanding in every respect. The welding is so delicate it must have been done by very talented mice. (Figure 3) The flanges are at least as thick as stock. This prevents the flange from warping and leaking, as some other aftermarket products with thin flanges are prone to do. The muffler was an exact fit on my 911SC, with no need to bend or grind anything, or enlarge any holes. GHL mufflers are designed with a separate tailpipe. This allows rotation and positioning of the tailpipe to get the outlet exactly where you want it. Additionally, GHL makes both three- and four-inch tips, so you can choose what you want, or change it later if you change your mind. The tailpipe slips snugly onto the muffler outlet, and is held in place by a heavy stainless steel clamp. (Figure 4) This article describes the installation of the GHL muffler on Bob Tindel’s 1983 911SC. Your car may differ slightly. A day or so before you start this project, I recommend spraying all of the fasteners, including the ones that hold the front of the catalytic converter to the heat exchangers, with penetrating oil. I have had excellent results with Wurth Rost-Off, and I have heard that PB Blaster is good, also. 1. Begin by jacking up the rear of the car, and placing it on jack stands. I put the jack stands under the torsion bar covers. (Figure 5)
2. Remove the three bolts that connect the rear end of the catalytic converter to the muffler inlet. (Figure 6)
3. Loosen the two muffler mounting bands (8mm allen-head) to the point that they can be slid off the muffler bracket. (Figure 7)
4. Support the old muffler, slide the mounting bands toward the outside of the car until they clear the muffler bracket, and lower the muffler.
5. Place the new mounting bands loosely around the new muffler, and raise it into position. Slide the mounting bands onto the muffler-mounting bracket, and install the mounting band fasteners loosely.
6. Connect the catalytic converter to the muffler inlet, but don’t tighten the fasteners yet.
7. Position the muffler in the desired position, ensuring it appears level under the car. You may need to loosen the fasteners connecting the front of the catalytic converter to the heat exchanger. A little looseness at the front of the catalytic converter will allow a lot of movement at the rear.
8. When you are satisfied with the position of the muffler, tighten the mounting bands, and then the remaining fasteners.
9. Rotate the tailpipe to position it as desired, and tighten the tailpipe clamp.
To me, the sound of the GHL is its top feature. I can best describe the sound at cruising speed as the purring of a very large cat. It is a deep, throaty tone, immensely enjoyable, but not one that will become annoying or give you headaches on long trips. It lets you enjoy the music of your Porsche engine, without upsetting the neighbors or attracting unwanted attention from The Man. It sounds awesome winding through the gears. The motto at GHL is “We take the “Rezz” out of resonate!” I can confirm that I didn’t detect any resonance or unpleasant noise from this muffler at any speed or RPM. As an added bonus, the freer exhaust flow provides a noticeable horsepower increase-up to 30 HP at the wheels on a Turbo, fitted with GHL headers and muffler. The Turbo also spools up about 750 RPM sooner. The sound of this system will put a smile on any Porsche owner’s face, and it looks great on the car. (Figure 8) If you need any parts, please call our Parts Department (toll-free) at 1-888-280-7799 for prices and availability. Hope this helps, Bob at Pelican Parts | 
