Thank god they lexus isn't follow the trend of turbo V6s. A good sports car is supposed to do more than just driv fast, it's supposed to make you feel something.
I'm watching this video because 2 Mexican guys conveniently removed my catalytic converters from my suv. And I'm driving to work without them. Woke all my neighbors at 4am. Idled down the street... 2400.00 replacement cost.
Hey I just watched your video from may first of 2019 about your harbor freight tools and I’d like to recommend rubber stall mats for your lid on your tool box. The stuff isn’t too expensive and it’s really strong. You can pick it up at places like tractor supply and it comes in different sizes. Let me know what you think.
I just got a question he had the hole in the front of the cat while he was pressure testing the back so wouldent that cause a drop in pressure after the cat anyeays
How does your car pass emissions testing after the double cat delete? Could you have instead installed an electric exhaust cut out UPSTREAM of the two cats and achieve the same goals?
@@jalee6587 In pennsylvania for emissions they just scan the ECU for codes, if there are no codes it passes, if there are any check engine codes it fails
@@PoorManMods Ls400 owner here contemplating upgrading to is-f. But interesting to note my car is pretty quiet with a primary cat delete into the stock resonator and dumped. Stock resonator almost looks like the same body size as the one on the isf lol Seems like yours in the video seems pretty loud. Compared to the camaros, mustangs, challengers, chargers that run around i feel like im about about ~60% as loud as them with just catbacks.
I don't have a dyno so I can't show how much power the cats consumed. But in the video I proved that they caused back pressure and back pressure theoretically hurts horsepower
Sounds really good! I have to get my exhaust replaced from the y pipe just before the secondary cats all the way back. So they say...and I'm thinking about doing something like this instead of using the original parts. I want my car to purrrrrrrr!
Does your state not have emission testing? I once got rid of my cats... Later on i had to buy replacement cats on ebay just to pass emissions. They weren't cheap...
I did no redo the test, there isnt really a need to. I feel like it in increased power slighty but i have no idea by how much. Pretty sure good cat back exhausts on these cars are good for like 15hp i think
Are you running stock mufflers? I was hoping the car would've sounded quieter. I wanna delete the cats as well for the extra hp but dont want noise lol
@@PoorManMods Ah ok. Do you think the removal of the 2ndary cats will clog up the mufflers too much? My friend told me it will but i wanna remove the cats anyway for the extra hp.
I have a Sc 400 personally I would leave the mufflers and get rid of the cats and resonators. Those resonators that are after the manifold are brutal for killing awesome DOHC noises
Your killing me Fred can't drop the $20 for stainless wire. Sounds way better, when you bought this car some super smart guy said you should do this in the comments.
I know I'm late to the party sounds great, but how is or was the drone after? I did a muffler delete, still a little quiet and not aggressive enough for my taste. I'm also coming from a coyote, lol. But the isf has been my dream since it first came out.
1.5 after cat and 3.5 in front /wouldn't that be 2lb difference . I don't believe you would add the 2 together. I'd like to see the pressure in that area now in your add on pieces
Cool video bro! Just need an advice. I have problem with one of my cat on bank 2. So I am thinking of deleting the cats. Just wondering about codes or engine check light after the cats are removed??? Did u get any codes from the O2 sensor or air fuel ratio sensors after cats were removed in your Lexus? I have Lexus LS600hl
Deleting the down stream 02 sensos will not affect the check engine light since they are after the 02 sensors. But if your upstream cats are bad or deleted and are making you have a p0420 code you can use with 02 sensor mini cat to trick the computer amzn.to/3vMh2Fs
@@PoorManMods yea they got you a little bit on the price for an 08-09. A bonus is the low mileage though. I'm looking to pick up a 2011 SFP w/ 77k miles next week. Already has Valley place service done, ppe headers, borla exhaust, RR racing usrs, lowering springs, and newer michelins on it. $27,500 is what I'm lookin at.
I always thought it was a Federal Crime to remove the catalytic converter from a street vehicle? ...plus you left the guys plate number exposed. I'm a paranoid person, though. LOL
@@PoorManMods I'm sorry, my point was too brief and unnecessarily negative. You measured, in a VERY unique scenario what loses would be. It would be VERY uncommon for someone debating the use of a 100cpi CAT vs none at all. (Put RACE in the title and it's more accurate). My real disappointment was not commenting on a 100CPI converter so people don't run out IN DROVES to buy that density. If it's better than I'd think, I'd owe you an apology. FWIW, I do know someone running your particular CAT and they will be swapping it out for a higher density model out of desire for less "smell". (Yes, they can tune)
God the Japanese v8 sound so good.
GHAT damn, bwa!
Right?!
Thank god they lexus isn't follow the trend of turbo V6s. A good sports car is supposed to do more than just driv fast, it's supposed to make you feel something.
I'm watching this video because 2 Mexican guys conveniently removed my catalytic converters from my suv. And I'm driving to work without them. Woke all my neighbors at 4am. Idled down the street... 2400.00 replacement cost.
Good you got them in action, the only strange thing is you don't have yur cats back.
I’ve binged watched all your isf videos 🔥
Gotta love that high redline
Hey I just watched your video from may first of 2019 about your harbor freight tools and I’d like to recommend rubber stall mats for your lid on your tool box. The stuff isn’t too expensive and it’s really strong. You can pick it up at places like tractor supply and it comes in different sizes. Let me know what you think.
I just got a question he had the hole in the front of the cat while he was pressure testing the back so wouldent that cause a drop in pressure after the cat anyeays
I'm curious how a high flow cat would compare.
or hi-flow resonators instead of secondary cats...?!
How does your car pass emissions testing after the double cat delete? Could you have instead installed an electric exhaust cut out UPSTREAM of the two cats and achieve the same goals?
my state only checks for Check Engine Light codes for emissions testing, it doesnt probe the tail pipe
@@PoorManMods they don't do a visual? This wouldn't pass visual test.
@@jalee6587 In pennsylvania for emissions they just scan the ECU for codes, if there are no codes it passes, if there are any check engine codes it fails
You should have flared the stainless end towards the front. Now the smaller pipe difference is going to creat alot of turbulence.
the pipe it went into was like a double walled pipe, it went in between the two walls, it didnt go inside the inner pipe, so its all good.
is this muffler delete, secondary delete, but stock headers and primary cats with the stock resonator?
correct
@@PoorManMods Ls400 owner here contemplating upgrading to is-f. But interesting to note my car is pretty quiet with a primary cat delete into the stock resonator and dumped. Stock resonator almost looks like the same body size as the one on the isf lol
Seems like yours in the video seems pretty loud. Compared to the camaros, mustangs, challengers, chargers that run around i feel like im about about ~60% as loud as them with just catbacks.
What wind deflectors do you have fitted? I bought some team heko and the fronts don't fit at all!
All of the pressure difference, which was very small, is at the high end of the RPM range.
So, what was the verdict?
I don't have a dyno so I can't show how much power the cats consumed. But in the video I proved that they caused back pressure and back pressure theoretically hurts horsepower
I would replace the resonator for an aftermarket, it will wake the exhaust note.
Thanks for the info, I'll be doing the same, any check engine lights?
No engine lights at all!!
@@PoorManMods perfect, good to know thanks
Sounds really good! I have to get my exhaust replaced from the y pipe just before the secondary cats all the way back. So they say...and I'm thinking about doing something like this instead of using the original parts. I want my car to purrrrrrrr!
Dooooo itt
Does your state not have emission testing? I once got rid of my cats... Later on i had to buy replacement cats on ebay just to pass emissions. They weren't cheap...
Pennsylvania has emissions testing but does not probe the tailpipe
@@PoorManMods the car would throw a cel because of no cats and itll fail
No, i removed the secondary cats not the primary cats
@@PoorManMods i see 👍
@Kris Nicholson they are 100% cats lol
Sounds more aggressive
Anything that creates back pressure Robs horsepower!!!
Did you redo the test after deleting the cats? What was the pressure difference? Also did you notice any power increase? I like your approach.
I did no redo the test, there isnt really a need to. I feel like it in increased power slighty but i have no idea by how much. Pretty sure good cat back exhausts on these cars are good for like 15hp i think
@@PoorManMods Nice rumble sound,is this v8 N/A or has Turbo?
I must have missed when you got a lift. Must be nice. I've been wanting to bite the bullet myself and get one.
i rent garage space in a warehouse, the lift is actually a community lift for all the tenants
@@PoorManMods That is pretty sweet.
@@DIYAUTOCAR yupp :D
@@PoorManMods did you dyno your car after test pipe cats delete?
@@autoperformance503 i have never put this car on a dyno unfortunately
Are you running stock mufflers? I was hoping the car would've sounded quieter. I wanna delete the cats as well for the extra hp but dont want noise lol
I deleted the rear mufflers and the 2 cats in this video. Now the car only has the 2 upstream cats and the factory resonator
@@PoorManMods Ah ok. Do you think the removal of the 2ndary cats will clog up the mufflers too much? My friend told me it will but i wanna remove the cats anyway for the extra hp.
@@PoorManMods how’s the drone with no mufflers or cats?
This is good. I am planning on doing the same with my LS430.
I have a Sc 400 personally I would leave the mufflers and get rid of the cats and resonators. Those resonators that are after the manifold are brutal for killing awesome DOHC noises
Your killing me Fred can't drop the $20 for stainless wire. Sounds way better, when you bought this car some super smart guy said you should do this in the comments.
What a classic "Kyle" comment
@@rustyshackleford3257 you still mad lmao
@@rustyshackleford3257 aren't you glad he bought those overpriced headers like you said he would hahahahaha
@@rustyshackleford3257 how is that fake race car by the way
@@kylemorris5180 I'm sorry what?
I took my supra in for downpipe /full hks exhuast the shop kept my cat converter would not allow me to take it .
Id be pissed
That’s straight stealing man
If I cut the secondary cats....will check engine come on? Was there anything connected to them like sensors?
no
@@mazpr2025 where u get ur replacement pipes?
I know I'm late to the party sounds great, but how is or was the drone after? I did a muffler delete, still a little quiet and not aggressive enough for my taste. I'm also coming from a coyote, lol. But the isf has been my dream since it first came out.
This with a muffler delete does drone. But it's not horrible
@Poor Man Mods thank you!
Did you plug the front barb fitting for the test?
Yes
1.5 after cat and 3.5 in front /wouldn't that be 2lb difference . I don't believe you would add the 2 together. I'd like to see the pressure in that area now in your add on pieces
Any check engine light come on from deleting 2nd cat. Any sensors connected to it?
No CELs!
Should get headers as they are a rubbish design removed one at work as the manifold had cracked
I want to but theyre $!
@@PoorManMods the oem replacement is just as pricey afew grand for one manifold 🤣🤣🤣
@@PoorManMods Hoping you can one day afford the Sikky headers
Save up for it mate they look good
Gain about 3-5% power at peak. Loose low end power and pollute 50 times more. Is that worth it for 3% average peak power?
Is this true?
@@juankyboy123 Most dyno runs show this.
hey all you need is a legit catback too if you own a isf it deletes the downstream cats and just leaves the cats on header
Good morning.
LexusIS F is the best.
👍😊🔔 I will register it.
Cool video bro! Just need an advice. I have problem with one of my cat on bank 2. So I am thinking of deleting the cats. Just wondering about codes or engine check light after the cats are removed??? Did u get any codes from the O2 sensor or air fuel ratio sensors after cats were removed in your Lexus? I have Lexus LS600hl
Deleting the down stream 02 sensos will not affect the check engine light since they are after the 02 sensors. But if your upstream cats are bad or deleted and are making you have a p0420 code you can use with 02 sensor mini cat to trick the computer
amzn.to/3vMh2Fs
RR-Racing tune will resolve the CEL code if using headers, and/or remove the primary cats.
What fog lights are those??
did a chunk of your primary cat fall out?
not that i know of
Milwaukee Fuel tools kick ass!
Yes i love them!
I deleted all 4 cats on my is 250 how do I get rid of the check engine light??
Put black tape over light 💡
has a nice sound to it
4 pounds of back pressure is significant.
bye bye cats!! LOL
I am new to these cars… How many cats does this Lexus have exactly?
4 cats total, so mine still has 2 left
Any powergains?
I did not put it on a Dyno to confirm
@@PoorManMods ok but did you lost low end torque after second cat delet?
Ordered my pipes yesterday morning just got then this evening to the muffler shop in morning
sweeetttt
@@PoorManMods thank you again!
@@krlm2280 youre welcome!
Where can I get these pipes exactly?
here :) amzn.to/3lrDbWn
@@PoorManMods Thank you so much! Just snatched me an ISF!
@@PoorManMods 45 or 90 degree?
@@jrizzyjoe hells yeah!!
@@jrizzyjoe 45
is that the catalytic converter are the resonator
Cats
How's the smell with this?
No bad smells
Welds look fine to me from camera distance! ;)
Both Pa1 is worth $600
Do cats rob you of horsepower? Find out somewhere else because this video isn't actually going to answer that question!
this video proves they can be restrictive, which theoretically is a horsepower restriction. My apologies for not owning a dnyo.
Word for today day
#Theoretically 😅
🤣☠
Sounds good awasone
Soooo??? Where are the results? Did it rob horsepower or not???
I did not put it on a dyno, but showing the cats restrict exhaust flow and increase back pressure shows that they do rob a little bit of power.
Can you do the same test but removing the primary cats 😈😁
I dont need to, headers are proven to give atleast 40whp! Lol
Poor Man Mods oh are you going to a PPE header?
@@YakuzaJZ Id go with SIKKY if the time comes
How much was that beast
$25k
Poor Man Mods how many miles? Currently looking for one
@@Rj-bc8sn 55k miles, if you can afford it look for 2010 or newer, they have better suspension and an LSD
@@PoorManMods yea they got you a little bit on the price for an 08-09. A bonus is the low mileage though. I'm looking to pick up a 2011 SFP w/ 77k miles next week. Already has Valley place service done, ppe headers, borla exhaust, RR racing usrs, lowering springs, and newer michelins on it. $27,500 is what I'm lookin at.
where can i buy those pipes to fit in after i cut the cats out ?
Same thing I want to know
That is the best sounding honda i ever heard especially with the honda fly by
Omg youre hilarious
Can i get a theoretical number of times you say "theoretically"
19
probably should get a carbon monoxide alarm too
50 Likes 0 Dislikes. Who will be first.
Lol
🔥🔥🔥
🔥🔥🔥🔥🔥
I always thought it was a Federal Crime to remove the catalytic converter from a street vehicle? ...plus you left the guys plate number exposed.
I'm a paranoid person, though. LOL
Its also illegal to speed
Should delete the whole car! 😂
Nooooo
Are you kidding me? How lame is the measurement and conclusion of this video?
They cause a restriction that I was able to measure
@@PoorManMods I'm sorry, my point was too brief and unnecessarily negative. You measured, in a VERY unique scenario what loses would be. It would be VERY uncommon for someone debating the use of a 100cpi CAT vs none at all. (Put RACE in the title and it's more accurate). My real disappointment was not commenting on a 100CPI converter so people don't run out IN DROVES to buy that density. If it's better than I'd think, I'd owe you an apology. FWIW, I do know someone running your particular CAT and they will be swapping it out for a higher density model out of desire for less "smell". (Yes, they can tune)
That sounds so mean damn
Good until you don't get an inspection
It passes inspection with no issues
That’s why you live in a free state dweeb