just a quick question for you all, i'm getting a 2.5" system made for my car, telstar tx5 v6. i've rung around to get quotes, and two are charging the same price, but one guy said he uses aluminized steel(?) and another uses 14 gauge mild steel. i asked the second guy(14 gauge) what the difference is, and he said the aluminized steel is only aluminized on the outside so it still burns out from the inside, you just can't see it.
what's the better option here?
i like the second guy better, and i think he does a better job, but if his materials are inferior, i think it would be safer to go with the first guy. any ideas?
Well, going by my days working in a smelter, the aluminized exhaust will just put an outside coating. This will stop the OUTSIDE elements from attacking the piping with rust. However, the insides are not protected, even if they are coated, due to the heat of the exhaust. It will have a 5 year bench life on a car.
When you talking about 14 gauge piping, your talking about the thickness of the pipe. The thicker, the more the pipe will "resonate" and give it a more deeper drone, especially if you get one of those rounded tips that point back inside the exhaust. However, the thicker the pipe, the heaver it'll be, and more strain will be put on your mounting brackets and rubber supports.
Try and push him for mandrel pending over the rear, it doesn't sound like much, but to get the flow out of the system, it'll work great. Mandrel bending the extractors/headers to the muff really doesn't do jack squat. It'll never hurt to ask if you can get a better deal.
You can always try a different exhaust shop!
"Keep it Real"
"Big D" Dion.
Ford XE Green n Gold 4.1L IL6 Nitrous Assisted. Best time to date: 14.338 @ 98MPH
Mazda 626 Faded Blue 2L IL4 NA Diesel!
paid my monies, got my exhaust upgraded to 2.5". looks sweet as, sounds pretty damn loud, hoping that it will die down/deepen just a tad as the muffler burns in, didn't really notice anything on the drive back from the exhaust shop to work, but i'll be out and about cruising tonight, probably waking up suburbs left right and centre!!
also turns out that the stock cat that was in there was totally buggered!! the outflow end had major cracks through the inside(the mesh bit?) and the inflow end of the cat (again, the mesh) had totally disintegrated!!! there was just a big fat hole there with strands of mesh just hanging on to the edge.
but anyway, all done and done, so hopefully everything goes well.
thanks for everyones advice.
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