Do either of you guys have audio clips of your exhaust post install? I'm about to pull the trigger on a muffler. Also, is the 2.5" the one I want? Or 2.25"?
Magnaflow 11226 or 11236 for the GX460? (7 Viewers)
- Thread starter Arch Stanton
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I'm sorry I don't. I ended up taking it off and putting the OEM one back on. It wasn't really that noticeable on the outside.
OEM exhaust is ~2.4 inches so you'd want a 2.5" muffler.
If you're drone-sensitive at all I'd recommend not doing a muffler upgrade. The listed Magnaflows are 14" and 18" long and have the potential for a lot of drone in the ~1,700-2,500 rpm range without a Helmholtz or quarter-wave resonator. If you're not drone sensitive it may not be a big deal, if you are drone sensitive you could hate the exhaust immediately and want your old muffler added back on. It's really person-specific, my wife/kids weren't bothered by the drone on my first few exhaust iterations but I definitely was bothered by it.
The best way to do this is a Dirty Deeds exhaust as it includes a quarter-wave resonator tuned to the 130 Hz problem frequency and it retains the OEM rear resonator. I have mine totally dialed now and it sounds perfect (adds to the driving experience) and provided some power, it was just a PITA to get it there.
If you're drone-sensitive at all I'd recommend not doing a muffler upgrade. The listed Magnaflows are 14" and 18" long and have the potential for a lot of drone in the ~1,700-2,500 rpm range without a Helmholtz or quarter-wave resonator. If you're not drone sensitive it may not be a big deal, if you are drone sensitive you could hate the exhaust immediately and want your old muffler added back on. It's really person-specific, my wife/kids weren't bothered by the drone on my first few exhaust iterations but I definitely was bothered by it.
The best way to do this is a Dirty Deeds exhaust as it includes a quarter-wave resonator tuned to the 130 Hz problem frequency and it retains the OEM rear resonator. I have mine totally dialed now and it sounds perfect (adds to the driving experience) and provided some power, it was just a PITA to get it there.
1,000,000% these GXs are drone boxes.
The only reason I spent so much time screwing with mine is that it did give some noticeable power upgrades which really helped for towing
. I find it kind of odd that Magnaflow, Borla, etc don't just include a real resonator in their GX systems or as a modular add-on to their universal mufflers to actually get rid of the drone (I think MF actually does have/had that for one of their T4R Overland systems, but not the GX systems). If I'm able to DIY a resonator on my shop and a HF welder it can't be beyond their R&D capabilities .
Agree. What is want is I wish we had a good complete exhaust kit manifold back.The only reason I spent so much time screwing with mine is that it did give some noticeable power upgrades which really helped for towing
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IMO: On custom 460..not likely to see a 3rd party tackle anything but post cat… with the stock manifold/cat setup
Multiple companies make ST and LT headers for the UR-powered 2nd gen Tundra. The demand is there with 14 years and several hundred K of 460s on the road, someone would just need to do the R&D. If it's anything like my 470 the results would be 100% worth it. I think the 460 and 470 share a similar Y-pipe between the manifolds and catback - if so the Y-pipe is actually pretty well designed. The rest of the OEM Toyota system is very restrictive and power-robbing.
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Perhaps in time ....
Those interested..should be hitting up companies requesting a version for 460. I imagine most shops are going to want to see 100 or more interests like some other gear
Stock 460
Those interested..should be hitting up companies requesting a version for 460. I imagine most shops are going to want to see 100 or more interests like some other gear
Stock 460
Once I get to a place of less debt I plan on buying a second GX460 for the sole purpose of making it a comfortable highway cruiser and I plan on paying a hefty fee for a quality exhaust shop up here to tackle the exhaust issue. I want manifold or headers back with the highest most efficient flow possible. Then I'll need to sound deaden the s*** out of the interior. LOL
I'm convinced there is 25-30bhp and torque sitting there untapped just from an exhaust change starting at the manifold or headers. With an aggressive tune and an aFe momentum intake added to the full exhaust mod I'm going to guess we have about 50-75bhp and torque waiting to be unleashed with all three of these mods. I think these engines are woefully under spec'd on purpose for longevity and whatever potential MPG savings as possible. The choke point is the exhaust 100% so it makes sense to start there since the factory intake box and manifold can flow quite a bit.
I'm convinced there is 25-30bhp and torque sitting there untapped just from an exhaust change starting at the manifold or headers. With an aggressive tune and an aFe momentum intake added to the full exhaust mod I'm going to guess we have about 50-75bhp and torque waiting to be unleashed with all three of these mods. I think these engines are woefully under spec'd on purpose for longevity and whatever potential MPG savings as possible. The choke point is the exhaust 100% so it makes sense to start there since the factory intake box and manifold can flow quite a bit.
You should ride in my 470 with all of those mods done . It's a hoot to drive, when the midrange torque kicks in at 3,000 rpm it will put you back in the seat. I'm running an 87 octane tune on it; haven't even needed to try the YotaWerx 91 octane tune yet. The 1UR probably has a higher ceiling than a 2UZ as it's already starting 31 hp higher.
As @Acrad mentioned, someone would need to work with the reputable header companies (Doug Thorley, JBA, URD, etc) to get the 460 headers going. The OEM integrated manifold/cat design looks very similar to the terrible 2UZ design (but the Y-pipe design looks good). I'm sure Toyota did this because it's easy to package and good for emissions. Doug Thorley is the only one who bothered to take on the 470 headers.
. It's a hoot to drive, when the midrange torque kicks in at 3,000 rpm it will put you back in the seat. I'm running an 87 octane tune on it; haven't even needed to try the YotaWerx 91 octane tune yet. The 1UR probably has a higher ceiling than a 2UZ as it's already starting 31 hp higher.As @Acrad mentioned, someone would need to work with the reputable header companies (Doug Thorley, JBA, URD, etc) to get the 460 headers going. The OEM integrated manifold/cat design looks very similar to the terrible 2UZ design (but the Y-pipe design looks good). I'm sure Toyota did this because it's easy to package and good for emissions. Doug Thorley is the only one who bothered to take on the 470 headers.
