03 LS430 - Complete Exhaust Replacement??
06-09-16, 10:46 AM
#16
Pole Position
I went to Home Depot and bought some bolts, washers and nuts. I THINK they are 3/8 by an 1 1/2 inches. It was awhile ago so I could be totally off. I would take yours and compare them.
As far as the metal gasket goes, it is a pretty common part.
Amazon says it's this one
As far as the metal gasket goes, it is a pretty common part.
Amazon says it's this one
06-09-16, 11:25 AM
#17
Instructor
The exhaust shop that did mine said that the Y-pipe came with gaskets but that he knows that those gaskets are no good (either they don't fit right or they fail quickly, I forget what he said), so he specially-ordered the OEM gaskets.
We know for sure that OEM gaskets are known to fail after 10-13 years of winters on salted roads. I don't know if aftermarket gaskets fail even faster. OEM exhaust manifold gasket part # is 17173-50021. They should be about $20 each.
We know for sure that OEM gaskets are known to fail after 10-13 years of winters on salted roads. I don't know if aftermarket gaskets fail even faster. OEM exhaust manifold gasket part # is 17173-50021. They should be about $20 each.
06-09-16, 02:08 PM
#18
Well if you wanna know about the exhaust being replaced on the LS430 just ask me. :-(. I had everything from one of the exhaust manifolds replaced($90,ebay), both cats($300,RockAuto), y-pipe($150,Rockauto), and both mufflers(CL member). Manifold had a crack, Y-pipe had the usual rust issue, both mufflers had holes on the top side(used OEM replacements are starting to do the same). Now i mistakenly replaced both of my cats due to a faulty diagnosis. The price wasn't bad for both, i did the labor myself and still have the old ones. The gaskets that came with the y-pipe do not seal all that tight and is now starting to leak at that area. The exhaust has been my Achilles heel for the is car. Otherwise she's been great. This weekend will be full of patch work. I will seal up holes in the mufflers and replace the CAT-ypipe gaskets with either new oem's, aftermarkets heavy duty, or combination of gasket and permatex gasket maker stuff. and see how it works. Stayed tuned! The LS-exhaust chronicles continue.....
06-09-16, 04:33 PM
#19
Lead Lap
Thread Starter
Lexus typically has a part number for every part. Is this DIY or are you taking to a muffler shop? There's a parts diagram for the entire exhaust assembly in your earlier thread > 
https://www.clublexus.com/forums/ls-...d-muffler.html
https://www.clublexus.com/forums/ls-...d-muffler.html
06-09-16, 04:36 PM
#20
Lead Lap
Thread Starter
Well if you wanna know about the exhaust being replaced on the LS430 just ask me. :-(. I had everything from one of the exhaust manifolds replaced($90,ebay), both cats($300,RockAuto), y-pipe($150,Rockauto), and both mufflers(CL member). Manifold had a crack, Y-pipe had the usual rust issue, both mufflers had holes on the top side(used OEM replacements are starting to do the same). Now i mistakenly replaced both of my cats due to a faulty diagnosis. The price wasn't bad for both, i did the labor myself and still have the old ones. The gaskets that came with the y-pipe do not seal all that tight and is now starting to leak at that area. The exhaust has been my Achilles heel for the is car. Otherwise she's been great. This weekend will be full of patch work. I will seal up holes in the mufflers and replace the CAT-ypipe gaskets with either new oem's, aftermarkets heavy duty, or combination of gasket and permatex gasket maker stuff. and see how it works. Stayed tuned! The LS-exhaust chronicles continue.....
06-09-16, 04:37 PM
#21
Lead Lap
Thread Starter
Yah man red line racing , rip mods, Bavarian rocket science, spraker motor sports, there's a bunch i cant remember the name but there's this shop in Schenectady that looks like a complete ****-hole then you walk inside they have supras, nsx, ****en gtr, i saw a 360 modena in there to if i can find the name i will deff let you know but those ones up top are great especially red line and rip mods, bavarian rocket science is mostly euros but they do bangen work also.
10-06-16, 10:20 AM
#22
Pole Position
I went to Home Depot and bought some bolts, washers and nuts. I THINK they are 3/8 by an 1 1/2 inches. It was awhile ago so I could be totally off. I would take yours and compare them.
As far as the metal gasket goes, it is a pretty common part.
Amazon says it's this one
http://www.amazon.com/Fel-Pro-61039-...r_1_11&sr=8-11
As far as the metal gasket goes, it is a pretty common part.
Amazon says it's this one
http://www.amazon.com/Fel-Pro-61039-...r_1_11&sr=8-11
Since I replaced the gaskets, I have not had the P0420 error.
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