I am looking at 4" exhaust systems, but a couple of points keep bugging me...
If I do NOT plan on changing my turbo to a monster, or duals, the exit port is only SO big...if you have a 4" exhaust, it still necks down at the turbo, and will still restrict, so how does it help if I am already 3" straightpiped?
I remember awhile back Banks did not recommend the larger exhausts because the gains were minimal. They apparently backed it up with some testing (water column flows and dyno). NOW they offer bigger exhaust! I know, some people like Banks, others don't. I am wondering if it is a marketing ploy (they finally got the tools to do larger exhaust). I had faith in Banks awhile back when I did my 97, and their system was SERIOUS fun. I wasn't impressed with what they did with the 24 valve engines, so I passed. Are they just jumping on the bandwagon?
I also don't need any more noise. What I have is fine, and can still scare old ladies, small children and wildlife while having an intelligent conversation with the better half. My stock exhaust is not rusty or damaged. Stainless is awful expensive.
With a couple of interesting mods, EGT's can climb when loaded down with the camper and boat while taking Grapevine style grades at insanity speeds.
Bottom line...will the drop in EGT's be significant, or is it just wishful thinking? The exhaust side of the turbo is only SO BIG!!!
What are your thoughts??? Input good and bad always welcome.
4" exhaust...is it REALLY helpful???
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