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I've visited their site several times now to look at their systems. I believe they only do custom installations at their TX location. I like that they offer a slew of optional exhaust tips - oval, round, black, polished and more. I did notice that they use a tradition pipe bending machine as opposed to a mandrel bend machine. Most aftermarket packaged exhaust systems utilize either mandrel bends or a cut/sectioned exhaust to make sure there is no wrinkling or compression in the curves.
I'm still partial to just swapping out the mid pipe section and leaving the stock factory axle back portion. Not sure if I would go resonated or non-resonated until I can hear more sound clips. The factory 472hp is plenty for me, not really bent on trying to squeeze out more performance from the engine but I would like a more satisfying exhaust note.
This is all based on when and IF, IF, IF I can ever get my Grecian Water car. I'm predicting that I won't have the car until well into 2023 which hopefully will give me more time to evaluate exhaust systems.
many exhaust shops just do the pipe bending cause it's easier and cheaper. as far as performance, you'll always want the smoother route from mandrel bent pipes or sectioned; in other words, no kinks or wrinkles. but of the owner or customer just wants better sound, then there's not need for mentioned. i'm thinking about upgrading my mid pipe as well, but will wait until more options are available. if i can get a whole cat back from a company, then i'll go that route, but if more companies make just axle backs, then i'll have to go frankenstein route. i hope you're able to get your car soon as well.
I doubt it given that video is 11 months old and apexi is just now releasing their exhaust. Looks like stock tips and the driver states "free flowing exhaust mod." I'd guess custom midpipes at that time period.
Yeah I know the video is 11 months old but when the IS500 was shown at SEMA 2021 the Hiroku and Townsend white IS500 had an Apexi, so I was wondering if the one they used for that track day was the same as that version. The reason Apexi was the first to drop an exhaust, I would assume, is because they were working with Lexus prior to it's release.
Yeah I know the video is 11 months old but when the IS500 was shown at SEMA 2021 the Hiroku and Townsend white IS500 had an Apexi, so I was wondering if the one they used for that track day was the same as that version. The reason Apexi was the first to drop an exhaust, I would assume, is because they were working with Lexus prior to it's release.
Sure it's possible it could have been a very early prototype, but the tips look stock to me. Add in the driver's quote about it's only a free flowing exhaust mod leads me to believe it wasn't a system at all but rather a midpipe or 2nd cat/resonator delete.
Sure it's possible it could have been a very early prototype, but the tips look stock to me. Add in the driver's quote about it's only a free flowing exhaust mod leads me to believe it wasn't a system at all but rather a midpipe or 2nd cat/resonator delete.
You're probably right, but as Ambybomb mentioned, the pinch point in the stock exhaust confounds me. Is this for back pressure? Am I over thinking it? I just kinda liked how the exhaust sounded in that particular video. On the flip side I like how this car is quiet and comfy for being a daily driver mostly. I just want like ... A tiny bit more sound when I'm pushing it.
You're probably right, but as Ambybomb mentioned, the pinch point in the stock exhaust confounds me. Is this for back pressure? Am I over thinking it? I just kinda liked how the exhaust sounded in that particular video. On the flip side I like how this car is quiet and comfy for being a daily driver mostly. I just want like ... A tiny bit more sound when I'm pushing it.
I believe you’re overthinking it. Lexus did it for clearance under the half shafts.
You're probably right, but as Ambybomb mentioned, the pinch point in the stock exhaust confounds me. Is this for back pressure? Am I over thinking it? I just kinda liked how the exhaust sounded in that particular video. On the flip side I like how this car is quiet and comfy for being a daily driver mostly. I just want like ... A tiny bit more sound when I'm pushing it.
Yes, I believe you are right on the money on backpressure. With more free flowing exhaust you will loose low end torque and gain marginally on peak torque. Confirmed this with dyno testing when I changed stock axle back for GTHaus (albeit this was on my RCF).
Purple line is stock axle back, yellow solid line is after changing to aftermarket axle-back. Note, this is with ARH long system headers. The lower yellow dotted line was bone stock car.
Purple line is stock axle back, yellow solid line is after changing to aftermarket axle-back. Note, this is with ARH long system headers. The lower yellow dotted line was bone stock car.
So you gained power in places by installing headers, but didn't gain anything by changing the axle back exhaust?
05-20-22, 07:18 AM
