Status of the exhaust ca tback system. I have a 2019 and nothing but problems with the Invidia cat back system. Leaks down stream from the cats keep throwing engine alert codes. Any problems on your end?
Dagored

 

What gaskets did you use? If you use the ones that invidia provided that's your problem or
If you used the OEM donut gaskets that's also your problem.

There's several post and threads dedicated to the invidia exhaust gasket leak issue.

Go to grimmspeed and either buy the 3" 12 layer gaskets (This is what I used), or get the normal grimmspeed 3" double thickness gasket. Use those directly after the headers. And for good measure get exhaust copper sealant.

If you use the grimmspeed gaskets you won't have a leak issue.

Also make sure your o2 wires aren't completely twisted into a mess.

-Nigel

 

Agree with Nigel. Definitely, installation must have went really wrong. Either O2 bung got damaged while trying to pry it off or the gaskets front/back are swapped as the rear one is slightly smaller. Who installed it? Was it a shop?

p.s. Just got back from getting my RR Racing USRS street version bushings installed. Will be writing a review soon.

 

Hi,
Lexus shop did the work. I'm out $775 but now have them on th ehook as the warranty is 12 months. However it's not fun driving an hour each way to the dealership, then waiting a few days for the fix, and going back. I'll be goign back Monday and this time I'm going to find out exactly what the find and what their fix was. I'm rellt tempted to find a set of stock used heder pipes, cut the flanges off and have them welded to the Invidia ss pipe. Then a stock OEM would work.
DR4

 

That's a lot of money to be out... Dang. Are you mechanically inclined at all? It's not a hard install/fix, especially if you have to drive an hour and then wait on top of that. Fixing the gaskets is about a 45 minute fix.

I responded to your other post with more information.

Get he grimmspeed gaskets and you'll be good to go.



You could always find a set of stock mid-pipe and cut the flanges off but then you're going to have to pay more money for an exhaust shop to do it but it would make it easier. At that point in I probably even go v-bands.

But seriously this isn't a huge deal as long as you get the correct gaskets. It just seems like the dealer that you're taking it to doesn't know what they're doing unfortunately and most shops don't give a crap, So they'll just keep throwing parts at it. The OEM gasket is definitely not designed for the exhaust because there's no recessed flange.

Hopefully this helps

-Nigel

 

Hi,
I'm a little confused re the refences to frnt/back and the "Rear" ones being smaller. I'm only concerned with the junction of the Invidia system where it connects to the stock exahust manifold after the cats. That's where you reccomend using the 3" Grimms?
DR4

 

The above reference is becuase people uses the wrong size gaskets on the exhaust since they are so similar looking, they think they are the same... so you have installers putting the wrong size gaskets in the wrong spots because they see 4 of them and they all look similar...etc.

The only ones you need to be concered with are the ones right after the headers. In my picture where you see the orange sealant around the flanges is where you will be using the Grimmspeed 3" s/s double thickness gaskets. That is where your problem is unless it's an o2 sensor problem. Everything after that you can use the Invidia normal gaskets or whatever is suppied.



-Nigel

 

Hi Nigel,
Well you can't get more detailed than that! I figured the area in question was where you had the rtv sealant.
I just ordered the 2x Grimms gaskets since the ones I have are not the double variety. When I'm at the dealer tomorrow I'll have a discussuon with the service guy to see if he's still not getting the problem. I could easily fix this myself per your detailed instructions but figured since we'll be in the Orlando are this coming week I'll let them futz with it again. I'm still not clear what they did the second time and if the first fix was throwing a code on the R side as well
My RC F is a daily driver although only abo-600 miles a month. Are you driing yours that much?
Stay tuned for follow up,
Thanx again,
DR4

 

Have not updated it in a while so I updated it with RR Racing ECU tune and RR Racing USRS LCA bushings.


Michelin Pilot Sport 4S XL - 9/10 - Very impressive as replacement for OEM PSS. The XL sidewalls really make the car feel planted and roll-resistant as the inner/outer walls resist deformation. Just got them 6 months ago so still have to see how they hold up at higher mileage. Only complaint, they are pricey relative to the competition as they cost $2000 CAD all in installed. I docked one point for it. I guess, gotta pay to play.

Eibach 20 mm Spacers - 8.5/10 - Love the look and also handling with spacers. Really like the planted feel in turns. No complaints. Only downside, the spacer bolts got a little warped while I was torquing them..

Invidia Q300 full cat back exhaust with titanium tips - 10/10 - This exhaust exceeded my expectations. Very melodious, smooth and pleasant noise. The increase in HP/torque is very noticeable at all rpms especially as the exhaust breaks in. When I got the exhaust, I was planning on taking off the resonator to get more volume, but so far I have not had the urge to as it is tuned so well.

AFE Power Stage 2 Cold air intake - 9/10 - Just drove it a few times with this cold air intake, but very happy and no complaints. The intake growl/snarl is more pronounced. I definitely feel better throttle response, a bit more punchier midrange torque especially when rpms fall back after shifts I now feel a surge in torque after shifting near redline. Priced decently. Simple install. Docked point for airbox not being CF.

AFE Power Sprint Booster v3 ETC - 9.5/10 - Savage response. Just totally unexpected. Race mode from 1 - 9 is basically way too sensitive. I use race mode 5 in good driving condition. Never tried setting 6 through 9 in race mode since it would be too much. The car virtually seems way lighter. The car engine brakes hard when you lift off. The way my car is setup with the back of the seat upright, high lumbar support, little dive/pitch (stiff tires and 39 PSI front and 41 PSI rear) so all sudden bolt forward and sudden engine brake strain your neck with the whiplash effect. Even sport mode 9 was way too much. I was dialing it down to sport mode 3 and still it had insane response. Off the line things are the most dramatic. You move your foot 20% down the throttle and the car shoots forward like a bullet. It is not the same effect as pressing down the throttle harder/further. Your limbs, high-twitch muscles are simply not fast enough to match what this little thing does. It is almost telepathic in how it is responding to the intentions in your brain. The whole cycle of action/reaction is way shorter. In other words, the cycle from the time you make a slight change to the throttle input to the time the car's wheels are fully delivering the reaction is way shorter. Everything seems like things are reacting way faster. Also, you don't need to downshift as much. I was coasting in 3rd gear at 50 KM/H and I pushed the throttle down a bit and got more than I asked for. Before, I would expect 2nd gear at 50 KM/H to have a similar effect.

p.s. When you are coasting in parking lots, the car is still very easy to drive around and there is no risk of hitting something as long as one does not suddenly stab the throttle down more than a couple of millimeter.

Antigravity Lithium Ion AG-H6-RS 30 Ah battery (12.8 lbs) - 10/10 - I took the longest time to decide on this. The OEM battery costs less than half installed than this battery alone factoring in the import costs as well. However, it has the battery management system in it. It has restart technology with two key fobs. It is super lightweight. I opted for the 30 Ah (stock is 74 Ah), but I felt it would be sufficient based on the fact that I don't use accessories when I drive so there is not much draw. The weight savings were quite nice. About 27.2 lbs compared to the OEM Panasonic battery I took out. All of that from the front. Car did not feel different any different while driving since 30 lbs would not be noticeable. However, it is great to have lighter weight. Battery should last 10 years, Installation was very simple and also the crank is very powerful. It spins so freely and easily on cold cranks that it starts up very quickly. All in all, very happy with this purchase. Very pricey, but it is totally worth it.

Carbon fiber mirrors - 9/10 - Over the winter, while the car was parked, I did the carbon fiber mirror covers. Ordered them from ebay. Shipping was quick and decent price. Quality of the carbon fiber is great. Weave very closely matches the weave in the spoiler and roof. Very lightweight. Installation was fairly easy. Just had to buy my own double sided tape since the one it came with, did not work well. Overall, very pleased with the look of it and also the quality. I only docked 1 point because the fitment is not perfect. Around the edges, there is a bit of Orange visible, but it is a minor thing given the price and quality.

RR Racing ECU tune for 2015 - 2016 RCF) - 10/10 - I had done the RR Racing ECU software tune remotely in my garage. Process was quite straight forward. I received a cable in the mail and I just needed a laptop with WiFI connection so that I could connect the cable to my USB2 port. Basically, there is software upload, download and then loading the tune etc. You just need a really good laptop to make sure the software tools can be installed. Anyway, results were very noticeable. Midrange seems to have a very strong gain from around 3500 rpm to about 6000 rpm. Top rpm gains are about +8 whp or so and mid-range torque gain is around +17 ft-lbs. Throttle response is also increased. I have the ETC SprintBooster as well so with the added throttle response, I have to dial back the SprintBooster. I also noticed the paddle shifters have a faster reaction to your input. Maybe, it is in my head, but my Dragy GPS numbers seem to confirm some really good gains. I use Octane 94 and this tune works really well. Some people might wonder, if the gains should have been more than +8 whp, but the great thing about this tune is, it is very safe and does not risk any long-term damage to the powertrain. That is the most important thing for me.

RR Racing USRS LCA bushing (street version, black) - 10/10 - I went with the street version (88 dur) as opposed to the street/race version that has a durometer reading of 90dur. They are still zero deflection especially in comparison with the FIGS SuperPro 90. So, the zero deflection prevents axial movement other than polyurethane restricting lateral movement. Overall, steering feels more instantaneous off-center in the first 1 inch and there is a bigger nose movement with very small inputs. SLALOM mode at higher speeds makes the nose very darty so I have dialed it back to NORMAL mode. It actually feels very close to stock-like feel/quality. If someone did not know this part was installed, that person would not think "it is too harsh for a Lexus". After driving it for a few weeks, I actually barely even notice it and don't even think about it unless I deliberately recall having this part installed. There are ZERO vibrations and a lot of it is because RCF's chassis is so rigid that it can handle a lot of rigidity in the suspension components. ZERO harshness and even stiffness wise, it does not feel significantly more stiffer than stock (mine only has 11,000 miles so it still has fresh OEM parts). So, all in all, if you are looking for a drastic difference, you might want to go with the red version (street/race). This particular version is so OEM-like for the RCF that it will not even be noticeable after a few drives. It works for me as I have a wife and two kids who come along for the drive a few times a year so I don't want it to have any unpleasant ride frequencies associated with my car. Biggest benefits are faster instantaneous steering response and no bump steer going fast over a sudden bump in the turn or on the freeway in the straight line. I give it a 10/10 as it meets all of my expectations and priced really well.

RR Racing Crank Damper Pulley - (TBD) - Sitting in a box waiting to be installed. I will get the maintenance and service done first and then get this installed. Should reduce internal inertia and make the car faster to rev. Will really be something I am hoping makes the experience more dramatic in how it accelerates and sounds especially on downshifts. Also, it gives some good accelerate gains in the 1st through 3rd gears where acceleration is steeper. At higher speeds in 4th gear onwards where acceleration rate drops, it would be mostly beneficial from a dead stop.

 

Invidia exhaust 0/10 Manufactured with incorrect flanges. On what planet does 3” = 2.75”? None.

Wheel spacers: 10/10 they did what they’re supposed to do

Swift lowering springs 9/10 They did what they’re supposed to do

High flow air filter 0/10 Dragy says I gained zero point zero seconds

Apexi cat back: 9/10. Fitment was perfect

Dragy: 10/10 It tells you what vendors are full of it. Certain mods have ZERO gain or benefit

Window tint: 10/10 I live in Florida

94 octane: Eh… 5/10 didn’t notice a big difference

87 octane: 0/10 performance decreased all over

$100 OBDII scanner logger 10/10 Verifys mods etc