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Aftermarket downpipes!

CoconutRob

Registered Member
439
301
63
Genesis Model Type
Genesis G70
I dont think you re
View attachment 18708


Lap3 officially has a downpipe solution for the G70. Has an option for a high flow cat as well. Looks very nice, but not cheap. Hopefully we see more options come in soon which will ultimately just benefit the consumer even more.

LAP3 Authentic Primary Downpipes | LAP3
I dont want to mess with the primaries since they are monitored and I believe some on the stinger forum had issues. I may replace the secondary that have no sensors . Junbl makes a set. I may contact SSR.
 

Toddasaurus

REEEEEEEEEEEEEEEE!!!!!
2,103
2,460
113
Portland, OR
Genesis Model Type
Genesis G70
I dont think you re
I dont want to mess with the primaries since they are monitored and I believe some on the stinger forum had issues. I may replace the secondary that have no sensors . Junbl makes a set. I may contact SSR.
I've heard the same thing. Have o2 sensor bungs, but the people that put in custom DP's did it without cats. Also, some sort of tuning solution is basically required, otherwise you WILL get a CEL.

Next thing I'm hoping for are a set of midpipes (with HFC's), then a good sounding exhaust. Perhaps ARK would be just right, as it would be a little louder with the aforementioned mods.
 

CoconutRob

Registered Member
439
301
63
Genesis Model Type
Genesis G70
I called Ssr today. They said they will eventually look into the G70 stinger fit. When I asked if they would ship a set out and let me test fit. The response was go online and purchase. Then I said NO for free man and I will be your test car, he laughed. Anyone in Cali they may work with you. I think with that response and the AWD fitment issues I have been reading on the stinger forum, I think I am just going with Junbl downpipes then eventually get the junbl evc.
______________________________
 

joschneider

G70 Member
704
802
93
Las Vegas, NV
Genesis Model Type
Genesis G70
I called Ssr today. They said they will eventually look into the G70 stinger fit. When I asked if they would ship a set out and let me test fit. The response was go online and purchase. Then I said NO for free man and I will be your test car, he laughed. Anyone in Cali they may work with you. I think with that response and the AWD fitment issues I have been reading on the stinger forum, I think I am just going with Junbl downpipes then eventually get the junbl evc.
Bummer thank you for calling though
 

Toddasaurus

REEEEEEEEEEEEEEEE!!!!!
2,103
2,460
113
Portland, OR
Genesis Model Type
Genesis G70
Crawled under my car today. The OEM midpipes really don't look that restrictive. If anything the only restriction would be at the back end of them where the secondary cats are. There is a bit of a crumpled looking transition from the pipe to the cat, but it's not bad at all.

Also, one thing I found very interesting.....the factory exhaust *might* actually already have an x-pipe. Take a look....

18980

The middle section the arrow is pointing to is pretty dang thick, it seems hollow in there when up close. Interesting. If it is indeed an x-pipe, my bet is that they're using it for noise cancelling. But who knows.
 

CoconutRob

Registered Member
439
301
63
Genesis Model Type
Genesis G70
Good find I wonder if it is connected. I was under to disconnect axle back to see what muffler delete sounded like and didnt even notice that.
 

CoconutRob

Registered Member
439
301
63
Genesis Model Type
Genesis G70
Well it was just a test. Sounded pretty good but too loud for me, maybe if I was 20 years younger I would be ok. My biggest dilemma with mods wheels and exhaust. You would think with todays technology there would be better wheel tire configurators that allow fitment for larger size tires and wheels. Exhaust you just got to hear in person I guess.
 

Toddasaurus

REEEEEEEEEEEEEEEE!!!!!
2,103
2,460
113
Portland, OR
Genesis Model Type
Genesis G70
Well it was just a test. Sounded pretty good but too loud for me, maybe if I was 20 years younger I would be ok. My biggest dilemma with mods wheels and exhaust. You would think with todays technology there would be better wheel tire configurators that allow fitment for larger size tires and wheels. Exhaust you just got to hear in person I guess.
I can understand that. As of right now I'm reconsidering even doing anything to the exhaust, as I really don't want it to be any louder than it is....
 

Miked218

Registered Member
79
46
18
Genesis Model Type
Genesis G70
I can understand that. As of right now I'm reconsidering even doing anything to the exhaust, as I really don't want it to be any louder than it is....
Jumping in on this conversation....Sorry ahead of time, this is going to be a VERY LONG read but hope you stick with me on this. I think it's important and someone else might appreciate the knowledge share...........I, too, have the same concern with not wanting the exhaust too much louder than it is as stock although would like the performance and efficiency gains of purchasing a tuner with the right mods. I don't race btw. I read, on C&D, they rated the stock exhaust at 80dB. Depending on what dB chart you look at, 80dB is similar to a kitchen garbage disposal, a vacuum cleaner (HA! which one?), an alarm clock (again, which one?), a busy hotel lobby, a screaming child, a jackhammer at 50ft away. Most of the exhaust systems, and there aren't many out there, I've looked at for the G70 are closer to 90dB and higher. 90Db is closer to an arc welder, lawn mower, convertible ride on the highway, orchestra pit, boiler room. The institutions specializing in hearing claim that 85dB is the loudest sound you should be exposed to on a regular basis. Persistent exposure to sounds louder can cause hearing loss over time. Another point of reference since I think it's a more universal sound is that an Ambulance Siren is 120dB.
I was just looking at the Lap3 Downpipes and emailing back and forth with Lap3 (David Chung) I've DM'd him on FB a few times in the past and in some posts however, I wanted to see what a direct response was by using the "contact us" feature direct from the Lap3 website.

My initial inquiry was asking what I can expect with a Lap3 v2 tuner, the required HKS 45IL Plugs and just their Primary Downpipes running on 93 octane (which is all I've ever put in the car).

Here is his response: "all cars are a little different, but we have been seeing anywhere from 430-450whp with a primary downpipes on 93 octane. Gasoline quality is the most important portion when it comes to netting the best result."

My response to him : Thank you for your response. I've used 93 Octane exclusively since driving the car off the lot regardless of the gas cost knowing how important it really is to performance and longevity of the car. Genesis recommends 91 or higher but they also claim 87 is ok too. This leads me think the stock ECU is either adaptive to the octane being used or the stock tune is inefficient and while, I'm protecting my investment with top tier gas, I feel like I'm getting less performance than I should for using 93 compared to someone saving over $1,000/yr in annual gas cost by using substandard or lower octane gas. With that said, it's my perception that purchasing the Lap3 v2 Tuner for my G70 3.3L along with the HKS plugs as required on the Lap3 website for the Tuner and keeping everything stock, that I'm supposed to be able to get better performance, better mpg and higher whp. Is this all correct? Secondly, reading the Lap3 Downpipes offering for my car, it states the stock downpipes are the bottleneck to the entire exhaust system because the stock pipe diameter is only 1.25" and the Lap3 downpipes are 2.4". If I buy the downpipes with the larger diameter and leave the remaining stock exhaust in place, what's the next bottleneck? Is the stock 1.25" downpipe connecting to 1.25" mid pipes then causing another bottleneck? or are the stock midpipes 2.4" meaning the mfg intentionally for some reason created that specific bottleneck to reduce performance by using smaller downpipe diameter? I'm confused. My concern isn't making the initial investment of the plugs, downpipes and tuner, my concern is making an investment that turns into an investment of never ending upgrades required to eliminate all the bottlenecks and get the most enjoyment, performance and mpg. Again, thank you for your response and looking forward to continuing this conversation and eager to learn and understand from "the best" before I start a potential never ending cash bleed.

Okay, go to the bathroom, take a break, drink a shot, go watch the GodFather Trilogy then come back to this post......

His response back to me:
Mike, your normal driving MPG will increase as the car takes advantage of timing and fueling adjustment we have made via pro-tuner mapping. The bottle neck come down to the next midpipe after upgrading the primary downpipes, and then the factory catback. You want to keep a little bit of back pressure, as these garrett G series turbos start burning oil without them. We suggest starting with the HKS plugs & Pro-Tuner, primary downpipe, and our upcoming meth kit to get most gain for the investment amount

My response back to him:
that makes sense to me and fits inline with my logic. So I'm guessing the the increased diameter of the primary downpipes creates slightly more power and performance (nanoseconds?) until it hits the next bottleneck which in this case is the midpipe because now the diameter reduces back down to 1.25" all the way through the catback, mufflers and out pipe, correct? Understanding that Lap3 is the benchmark, and since I haven't read much or anything from or related to Lap3 regarding CAI's, is it also fair to say that spending up to $500 on some of the CAI's out there is probably a waste of money?

His response back to me: Most bolt-ons are just gravy on top...but is it worth it? To some, 0-5hp may be worth $500. Some, may not. Most open air filters do their jobs, but the gains over cost is nowhere near as good as what we sell. We typically don't sell parts that don't make power. The primary downpipe is nice to upgrade as the diameter of it is much smaller than the rest of the exhaust system, and the primary cats are extremely restrictive. Hence it's worth upgrading vs other parts of the exhaust system.

My response back to him:
I can't thank you enough. I finally have a better understanding now. I almost started with purchasing $528 Agency Power CAI's, not going to do that now, money better spent with Lap3 instead. Are there front and back cats? Would installing the new primary downpipes delete two front cats? If Lap3 only sells parts that make power, why doesn't Lap3 sell a full exhaust system instead of just primary dp's? Seems like there are less than 8 full cat back exhaust systems for the G70 3L and they all increase the sound to a minimum 90 Db which is too loud for me and my neighbors liking and my research says the stock exhaust is 80 Db. My problem now is trying to find either a full cat back exhaust system less than 90 Db or Frankenstein a system together which will just cost more.

His response back to me:
There are cats on primary downpipe, and secondary cats on midpipes. We haven't noticed much of difference with catless midpipes, but primary downpipes did make difference in real life racing applications. Catbacks are up to you if you want more sound. If you are worried about sound or rasps, I just recommend doing primary downpipe and leave the rest of the exhaust system stock.

And that was the last communication we had. It was today through email back and forth quick replies over the course of five hours. Impressive responsiveness.

After soaking all that in, processing it and unpacking everything, I'm very attentive and eager to hear some meaningful feedback from some of the top members in the forum about this topic.
 

joschneider

G70 Member
704
802
93
Las Vegas, NV
Genesis Model Type
Genesis G70
Great that lap3 has that kind of support, bodes well for anything purchased from them. But what kind of feedback are you looking for? Everything he said seems basically right to me, but I do think the gains from a sec dp are the same as an intake so don’t totally agree with that.

From what I’ve read, JB4 seems like the better tuning option than lap3 as well
______________________________
 

Miked218

Registered Member
79
46
18
Genesis Model Type
Genesis G70
Great that lap3 has that kind of support, bodes well for anything purchased from them. But what kind of feedback are you looking for? Everything he said seems basically right to me, but I do think the gains from a sec dp are the same as an intake so don’t totally agree with that.

From what I’ve read, JB4 seems like the better tuning option than lap3 as well
I have been just over thinking and over analyzing too many things. Also reading one thing then reading or being told something different or opposite. The thing with sales is that if one doesn't sell, then one doesn't get paid, so there is a bias. I'm not saying it's a bad thing or accusing anyone of being intentionally deceptive to sell their own product. That brings me to this forum so we can have hopefully conversations where it limits the sell bias a tiny bit and more vendor/mfg agnostic when it comes to spending money on our rides. What feedback am I looking for? Exactly like how you responded, "everything he said seems basically right to me." I don't know why I feel hooked on Lap3, no idea. I looked at JB4 but didn't get the warm and fuzzy about it, no specific reason. I went from never having a turbo to having one, not knowing anything about performance mods to being overwhlemed (self-inflicted) to now being at least able to somewhat hold a conversation and learned a dizzying amount of information. Getting itchy to do something but after all this time and research and learning, I think I have more to learn before moving forward. Everyone seems to want something different and I'm no different, in that, I'm just trying to get the best for what I want too and help someone else if I can in the process.
 

Miked218

Registered Member
79
46
18
Genesis Model Type
Genesis G70
Here’s a good thread I think: 3.3TT - JB4 or Exhaust first?

Replace jb4 with lap3 in your mind, since they do the same thing. The stinger is basically our car, so it all applies evenly. I would highly recommend reading the stinger forums too for more info since they’ve basically been beta testing everything for over a year ahead of us
Why is JB4 half the price of LAP3? Not complaining. I actually love that but something doesn't add up to me when two competing products each making the same or similar claims and one is double the price of the other. Is it economies of scale? Is it name brand vs generic? Is LAP3 that much better to command double the cost or just full of themselves or marketing hype or paying for the name?
 

joschneider

G70 Member
704
802
93
Las Vegas, NV
Genesis Model Type
Genesis G70
Why is JB4 half the price of LAP3? Not complaining. I actually love that but something doesn't add up to me when two competing products each making the same or similar claims and one is double the price of the other. Is it economies of scale? Is it name brand vs generic? Is LAP3 that much better to command double the cost or just full of themselves or marketing hype or paying for the name?
There’s lots of comparison threads on the stinger forum but as for the price difference...no clue how they justify it. Lap3 is a big brand name in Korea and the G70 launched there so maybe the market supports it
 
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