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Old 02-07-2011, 08:28 PM   #22
GriffithBuilt
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Quote:
Originally Posted by cardude007617 View Post
its just a muffler delete.... wouldn't that be piss loud and drone like crazy? they look to be high quality though.
No and no. These do not drone at cruise. Nor are they piss loud. As xsabre was noting, we measured with our dB meter here and we look at average dB for the same point in the power band at the same measured distance. We got 5dB increase at low idle, 8-10dB increase at the starting high idle and inside the car around 5-10dB increase across the powerband. At cruise, wind noise drowned out the sound of the exhaust on the meter both as stock and as modified with our exhaust.

Quote:
Originally Posted by SupaHottSauce View Post
It's the thickness of the welds, the quality of the metal, thickness of the metal, and the longevity of the packing in the muffler.

The sound will change over time because the packing will break down.

The welds may crack.

The tubing will be thin walled, and will be prone to cracking because of heat. It happened on a cheap downpipe I have.

You spent a lot of money on a good car, why skimp out now?
No packing, these are straight pipes. If the welds crack from any manufacturing defect we will replace them. 2 year published warranty. Tubing is Rathgibson T304 Stainless Steel .065 wall. If we went any thicker it'd look like a turbo manifold. And while downpipes see temperatures capable of exacerbating welds which were done at too high a temperature in the first place, this would almost never be an issue at a tailpipe unless there were forces inherent to the system that cause repeated fatigue at one of the joints. With a 18" long pipe hooked to two hangers that allow forward to rear motion, this is not so much an issue either.

Just to let you know a little hint about how things are made overseas. Most of the time the pipes are either stainless mig welded or quickly auto-tig welded with poor color and at too high a temperature. They are then chromed or plated as a subassembly and then run through a robotic tig torch to get those giant, wide overlap welds that have gorgeous color. Ever been curious about how they get that uniform color? They have a full layer of chromium at the surface to alloy into the weld as they go. So you get a pretty design that at its core has been done poorly. Because the alloys in the stainless have been baked out during the hurried and poorly controlled weld temperature, even though there is a shiny surface, the weld below still suffers from being embrittled during its initial weld process.

And if that doesn't make you think more closely about buying American, consider the materials we use and the safety precautions that we require on this side of the pond with regard to cancer causing agents in Thoriated Tungsten and Chromium rich materials. We require ventilators and a wide variety of safety equipment in our shop that protect our workers and owners from these hazards. We use only ArcTime tungsten from ArcZone.com (another American made product and American owned company), which is radioactive element free...so when we grind our tungsten we're not breathing cancer. Now think about that process I described earlier, the one with the chromium layer on the outside being welded...yeah - that's highly toxic as well and causes cancer. 8 out of 100 workers who weld on chromed parts get cancer. This is something that hits home for us - John's father in law, a stainless welder for 37 years, died of lung cancer from the particulates associated with suboptimal materials like Thoriated Tungsten and poor ventilation systems.

Just our 2 cents.

Jason Griffith
Engineering Director
Nameless Performance, Inc.
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Last edited by GriffithBuilt; 02-07-2011 at 08:29 PM. Reason: I forgot to type the word 'at' in one place, and I'm anal like that.
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