PPE Header Questions
09-14-20, 04:57 AM
#1
Driver
Thread Starter
PPE Header Questions
Apologies another thread on headers as I could not find all the questions to my answers.
I am installing RHD - PPE UEL Headers on an otherwise stock RC F, just got an K&N drop-in filter.
Can someone link a detailed RC F install guide the only ones I can find are brief or they are for the ISF. I understand the two are almost identical as a platform but why can't I find an RC F guide, surely someone has done one since 2015.
Is it required to:
1. Get a front wheel alignment as the steering knuckle is disconnected
2. Is it a must to replace O2 sensors as from what I read Lexus sensors are temperamental and a big chance they will throw an error once removing & reinstalling
3. I understand the benefits of a tune after installing headers however I prefer to keep my car as OEM as possible, if I use O2 extenders on the rear sensors will this be a 100% workaround avoiding CEL by tricking the ECU into thinking cats are working fine with a change in air flow downstream.
Does anyone have sound clip of PPE UEL Headers & or any other header hook up to OEM exhaust system?
On this setup is it fair to expect 28-30 WHP gain if no, what should I be expecting. I know dynos are like comparing apples with oranges and HP increases don't always translate into real world experiences.
A little off topic but an extra question
For example I have seen videos where stock RC F's pulling bigger dyno HP numbers vs. expensive cat back systems, same conditions, same dyno. But furthering this thought I have seen two RC F one stock, the other cat back line up for several runs and the cat back RC F pulls 2 car lengths in 3rd each and every time.
I am installing RHD - PPE UEL Headers on an otherwise stock RC F, just got an K&N drop-in filter.
Can someone link a detailed RC F install guide the only ones I can find are brief or they are for the ISF. I understand the two are almost identical as a platform but why can't I find an RC F guide, surely someone has done one since 2015.
Is it required to:
1. Get a front wheel alignment as the steering knuckle is disconnected
2. Is it a must to replace O2 sensors as from what I read Lexus sensors are temperamental and a big chance they will throw an error once removing & reinstalling
3. I understand the benefits of a tune after installing headers however I prefer to keep my car as OEM as possible, if I use O2 extenders on the rear sensors will this be a 100% workaround avoiding CEL by tricking the ECU into thinking cats are working fine with a change in air flow downstream.
Does anyone have sound clip of PPE UEL Headers & or any other header hook up to OEM exhaust system?
On this setup is it fair to expect 28-30 WHP gain if no, what should I be expecting. I know dynos are like comparing apples with oranges and HP increases don't always translate into real world experiences.
A little off topic but an extra question
For example I have seen videos where stock RC F's pulling bigger dyno HP numbers vs. expensive cat back systems, same conditions, same dyno. But furthering this thought I have seen two RC F one stock, the other cat back line up for several runs and the cat back RC F pulls 2 car lengths in 3rd each and every time.
09-14-20, 09:17 AM
#2
Apologies another thread on headers as I could not find all the questions to my answers.
I am installing RHD - PPE UEL Headers on an otherwise stock RC F, just got an K&N drop-in filter.
Can someone link a detailed RC F install guide the only ones I can find are brief or they are for the ISF. I understand the two are almost identical as a platform but why can't I find an RC F guide, surely someone has done one since 2015.
Is it required to:
1. Get a front wheel alignment as the steering knuckle is disconnected
2. Is it a must to replace O2 sensors as from what I read Lexus sensors are temperamental and a big chance they will throw an error once removing & reinstalling
3. I understand the benefits of a tune after installing headers however I prefer to keep my car as OEM as possible, if I use O2 extenders on the rear sensors will this be a 100% workaround avoiding CEL by tricking the ECU into thinking cats are working fine with a change in air flow downstream.
Does anyone have sound clip of PPE UEL Headers & or any other header hook up to OEM exhaust system?
On this setup is it fair to expect 28-30 WHP gain if no, what should I be expecting. I know dynos are like comparing apples with oranges and HP increases don't always translate into real world experiences.
A little off topic but an extra question
For example I have seen videos where stock RC F's pulling bigger dyno HP numbers vs. expensive cat back systems, same conditions, same dyno. But furthering this thought I have seen two RC F one stock, the other cat back line up for several runs and the cat back RC F pulls 2 car lengths in 3rd each and every time.
I am installing RHD - PPE UEL Headers on an otherwise stock RC F, just got an K&N drop-in filter.
Can someone link a detailed RC F install guide the only ones I can find are brief or they are for the ISF. I understand the two are almost identical as a platform but why can't I find an RC F guide, surely someone has done one since 2015.
Is it required to:
1. Get a front wheel alignment as the steering knuckle is disconnected
2. Is it a must to replace O2 sensors as from what I read Lexus sensors are temperamental and a big chance they will throw an error once removing & reinstalling
3. I understand the benefits of a tune after installing headers however I prefer to keep my car as OEM as possible, if I use O2 extenders on the rear sensors will this be a 100% workaround avoiding CEL by tricking the ECU into thinking cats are working fine with a change in air flow downstream.
Does anyone have sound clip of PPE UEL Headers & or any other header hook up to OEM exhaust system?
On this setup is it fair to expect 28-30 WHP gain if no, what should I be expecting. I know dynos are like comparing apples with oranges and HP increases don't always translate into real world experiences.
A little off topic but an extra question
For example I have seen videos where stock RC F's pulling bigger dyno HP numbers vs. expensive cat back systems, same conditions, same dyno. But furthering this thought I have seen two RC F one stock, the other cat back line up for several runs and the cat back RC F pulls 2 car lengths in 3rd each and every time.
1. Yes, I did an alignment, but only to be sure. I don't think it needed the alignment to be honest, but I thought it was off, though multiple people told it was fine.
2. No, I only needed to install the O2 extenders, which come with the Headers, and they need to go on the mid pipe only (rear sensors) as you mentioned.
3. Yes, it should. I do not have a tune because I have a 2018 GSF, and so far I do not have any CELs.
Keep in mind that you might need to bend the oil dip stick housing. I had to do it for my PPE EL Headers, but the installer damaged my OEM housing trying to bend it, and I went back to PPE to send me a pre bent oil dip stick housing. I don't know if it is needed for the UEL Headers or not, but you can check with them.
I will attach the installation guide I received from PPE, which is actually for an RCF. The instructions are for EL Headers, but I thought the process might be the same.
As for the gains, yes it is expected to be around the 25 -30 whp. You will notice it immediately in the low and mid ranges once you have the headers on. For the sound it is below, though not a long one and a crappy phone video, but will give you an idea.
Last edited by 1wacko; 09-14-20 at 09:29 AM.
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09-14-20, 09:58 AM
#3
Lexus Test Driver
Gains wise, yes you should see a very good gain with the headers. 25 whp is quite typical. Regarding your question about dynos, they are very difficult to compare before/after due to the variables in dynos. Only before/after done the same day or dynos done back-to-back can be compared. However, from personal experience, a full exhaust gives a very noticeable gain in poiwer/torque across the rev range.
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1wacko (09-14-20)
09-14-20, 01:31 PM
#4
Driver
Thread Starter
Thank you all.. a few more questions:
PPE UEL RC F headers is it required to bend the oil dip stick?
Do PPE come with a micro processor for CEL like Sikky or instead they use O2 extenders/conditioners.. thanks again
PPE UEL RC F headers is it required to bend the oil dip stick?
Do PPE come with a micro processor for CEL like Sikky or instead they use O2 extenders/conditioners.. thanks again
09-14-20, 02:43 PM
#5
Intermediate
09-14-20, 03:10 PM
#6
I had both UEL and EL when I had my ISF. Both required bending of the oil dipstick tube. But, AFAIK a later model of the UEL header did not require bending.
Lou
01-12-21, 06:40 PM
#7
Pit Crew
2011 ISF but should be similar to rcf.
Mine did not come with o2 extender/spacers. Anybody know/have some from amazon or other online site that works well?
I have the RR tune but because it is very inconvenient to get anything over 93 octane where I am located so I want to be on stock tune very often. They mentioned I'll be making less power than on oem tune while running 91 on their tune. If someone does this with no issues let me know.
Mine did not come with o2 extender/spacers. Anybody know/have some from amazon or other online site that works well?
I have the RR tune but because it is very inconvenient to get anything over 93 octane where I am located so I want to be on stock tune very often. They mentioned I'll be making less power than on oem tune while running 91 on their tune. If someone does this with no issues let me know.
Last edited by LSpho; 01-12-21 at 08:48 PM.
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01-13-21, 09:48 AM
#8
Unequal Length install guide can be found on PPE's website: https://ppeengineering.com/wp/ppe-en...-home/support/
They have an Equal Length guide listed, but it goes to a dead link the last time I checked. I plan to scan the paper instructions that came with my EL headers whenever I get a chance.
You will need the 90 deg elbow style ones. If you reach out to PPE directly they can sell/send you the proper ones or at least tell you what to look for. Attached in the instructions they sent me, might be able to find online based on the pics.
They have an Equal Length guide listed, but it goes to a dead link the last time I checked. I plan to scan the paper instructions that came with my EL headers whenever I get a chance.
2011 ISF but should be similar to rcf.
Mine did not come with o2 extender/spacers. Anybody know/have some from amazon or other online site that works well?
I have the RR tune but because it is very inconvenient to get anything over 93 octane where I am located so I want to be on stock tune very often. They mentioned I'll be making less power than on oem tune while running 91 on their tune. If someone does this with no issues let me know.
Mine did not come with o2 extender/spacers. Anybody know/have some from amazon or other online site that works well?
I have the RR tune but because it is very inconvenient to get anything over 93 octane where I am located so I want to be on stock tune very often. They mentioned I'll be making less power than on oem tune while running 91 on their tune. If someone does this with no issues let me know.
02-28-22, 08:45 AM
#9
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Apologies another thread on headers as I could not find all the questions to my answers.
I am installing RHD - PPE UEL Headers on an otherwise stock RC F, just got an K&N drop-in filter.
Can someone link a detailed RC F install guide the only ones I can find are brief or they are for the ISF. I understand the two are almost identical as a platform but why can't I find an RC F guide, surely someone has done one since 2015.
Is it required to:
1. Get a front wheel alignment as the steering knuckle is disconnected
2. Is it a must to replace O2 sensors as from what I read Lexus sensors are temperamental and a big chance they will throw an error once removing & reinstalling
3. I understand the benefits of a tune after installing headers however I prefer to keep my car as OEM as possible, if I use O2 extenders on the rear sensors will this be a 100% workaround avoiding CEL by tricking the ECU into thinking cats are working fine with a change in air flow downstream.
Does anyone have sound clip of PPE UEL Headers & or any other header hook up to OEM exhaust system?
On this setup is it fair to expect 28-30 WHP gain if no, what should I be expecting. I know dynos are like comparing apples with oranges and HP increases don't always translate into real world experiences.
A little off topic but an extra question
For example I have seen videos where stock RC F's pulling bigger dyno HP numbers vs. expensive cat back systems, same conditions, same dyno. But furthering this thought I have seen two RC F one stock, the other cat back line up for several runs and the cat back RC F pulls 2 car lengths in 3rd each and every time.
I am installing RHD - PPE UEL Headers on an otherwise stock RC F, just got an K&N drop-in filter.
Can someone link a detailed RC F install guide the only ones I can find are brief or they are for the ISF. I understand the two are almost identical as a platform but why can't I find an RC F guide, surely someone has done one since 2015.
Is it required to:
1. Get a front wheel alignment as the steering knuckle is disconnected
2. Is it a must to replace O2 sensors as from what I read Lexus sensors are temperamental and a big chance they will throw an error once removing & reinstalling
3. I understand the benefits of a tune after installing headers however I prefer to keep my car as OEM as possible, if I use O2 extenders on the rear sensors will this be a 100% workaround avoiding CEL by tricking the ECU into thinking cats are working fine with a change in air flow downstream.
Does anyone have sound clip of PPE UEL Headers & or any other header hook up to OEM exhaust system?
On this setup is it fair to expect 28-30 WHP gain if no, what should I be expecting. I know dynos are like comparing apples with oranges and HP increases don't always translate into real world experiences.
A little off topic but an extra question
For example I have seen videos where stock RC F's pulling bigger dyno HP numbers vs. expensive cat back systems, same conditions, same dyno. But furthering this thought I have seen two RC F one stock, the other cat back line up for several runs and the cat back RC F pulls 2 car lengths in 3rd each and every time.
Any update on this how did the install go? I believe you don’t need to bend any dipstick for PPE UEL for RHD cars!
Also what happens when you remove the dampers off the engine mounts? Is it necessary?
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