Interest Thread: AAM Competition 2.5" H-Pipe + Res Mid-pipe to shorties or stock rear

[Sales@AAMComp]

Originally Posted by Sh0velMan

I really, REALLY want to see a back to back comparison between stock nismo H-pipe and this one.

In my experience, most of the magic of the Nismo OEM CBE is that H-pipe, so it'll be telling.

You beat me to it. This is the unofficial press release I've been working on

AAM Competition 370z S-Line Midpipe

One of the bigger restricting components on the 370z is the exhaust system. Nissan figured this out when they redesigned the catback system for their Nismo 370z to adapt a more free flowing system which included, a redesigned H-pipe with dual outlets vs their Y-pipe with a single outlet, and a more free flowing muffler. With the revised exhaust system and a slight tweak to the ECU, Nismo 370zs gained 18 crank hp from the factory

With the success of the Nismo exhaust, AAM Competition took this one step further and designed the S-Line Midpipe, a true 2.5” exhaust system connecting the factory catalytic converters to the stock rear muffler. The factory Nismo H-pipe and intermediate pipe starts off at 2 1/8” from the factory catalytic converters, opens up to 2 1/4” at the intermediate pipe, then taper back down to 2 1/8” by the time it hits the muffler. Although we would never doubt Nismo parts, we took on the challenge of designing a larger and more efficient system. The S-Line midpipe has been dyno proven to gain +20 hp to the wheels and +19 ft lbs of torque over a stock 370z, equipped only with our short tails, all else stock!

AAM Competition S-Line Midpipe is handcrafted with mandrel bent 2.5” 16 gauge T-304 stainless steel. The system consists of a 2.5” H-Pipe and a 2.5” resonated intermediate pipe. This makes it perfect for those who want the added performance of an upgraded midpipe but want to keep the factory muffler to keep exhaust volume down, or those who already have our short tails and would like to continue the rest of their exhaust system.

• 2 component system; 2.5” H-Pipe and 2.5” resonated intermediate pipe
• Connects factory catalytic converter to stock rear muffler (Nismo or Non Nismo) or;
• Direct bolt on to AAM Competition S-Line Short Tails
• 2.5” mandrel bent 16 gauge T-304 stainless steel
• T-304 stainless steel flanges
• Precision TIG welded in house
• Dyno proven +22 wheel hp +20 ft lbs of torque
• All hardware included
• Made in USA

[Sh0velMan]

Originally Posted by Khoi@AAMComp

You beat me to it. This is the unofficial press release I've been working on

Nice. When you have back to back dyno results, let us all know. I'm sure there will be some customers..

[Sales@AAMComp]

Originally Posted by Sh0velMan

Nice. When you have back to back dyno results, let us all know. I'm sure there will be some customers..

The results above was from a stock base 370z with short tails (simply a muffler delete we offer). Granted this is a Y-pipe configuration into an intermediate pipe, so not a true dual from factory

Although the Nismos get +18hp from factory, it's not all from the exhaust, they also retweaked the ECU, I'm not sure of the specifics but when you physically look at the oem H-pipe and intermediate pipe, they look like straws!

If there are any local Nismos with stock exhaust on still and want to test this out, we can work on some discounts for you. I plan on doing a group buy for this, 0-5 sets, or 6-10 sets for a different tier discount. In return I hope everyone writes a reviews and hopefully everyone has a slightly different exhaust set up, whether they're running our short tails, stock muffler, stock cats, test pipes, hfcs, etc. Many options here

[Sh0velMan]

Originally Posted by Khoi@AAMComp

The results above was from a stock base 370z with short tails (simply a muffler delete we offer). Granted this is a Y-pipe configuration into an intermediate pipe, so not a true dual from factory

Although the Nismos get +18hp from factory, it's not all from the exhaust, they also retweaked the ECU, I'm not sure of the specifics but when you physically look at the oem H-pipe and intermediate pipe, they look like straws!

If there are any local Nismos with stock exhaust on still and want to test this out, we can work on some discounts for you. I plan on doing a group buy for this, 0-5 sets, or 6-10 sets for a different tier discount. In return I hope everyone writes a reviews and hopefully everyone has a slightly different exhaust set up, whether they're running our short tails, stock muffler, stock cats, test pipes, hfcs, etc. Many options here

I have the Nismo OEM exhaust on my non-nismo 370, and while I must admit I never did a baseline with the stock exhaust, my baseline with the Nismo Catback and no other changes was 292whp. Talked it over with our contact inside NISMO NA and he pretty much confirmed the 'ecu tweak' is just a slighty altered fuel table for the exhaust.

That's why I'm interested to see what your H pipe can do, because more than one person has lost HP switching from the Nismo OEM CBE to an aftermarket true dual CBE.

[Sales@AAMComp]

Originally Posted by Sh0velMan

I have the Nismo OEM exhaust on my non-nismo 370, and while I must admit I never did a baseline with the stock exhaust, my baseline with the Nismo Catback and no other changes was 292whp. Talked it over with our contact inside NISMO NA and he pretty much confirmed the 'ecu tweak' is just a slighty altered fuel table for the exhaust.

That's why I'm interested to see what your H pipe can do, because more than one person has lost HP switching from the Nismo OEM CBE to an aftermarket true dual CBE.

That's tough to believe but I guess the numbers don't lie. Would have loved to see your baseline on the stock exhaust for a good comparison between the Nismo CBE and Non Nismo CBE

[Sh0velMan]

Originally Posted by Khoi@AAMComp

That's tough to believe but I guess the numbers don't lie. Would have loved to see your baseline on the stock exhaust for a good comparison between the Nismo CBE and Non Nismo CBE

Yeah me too. Data is gooood.

Edit:

Oh sorry, 296whp...

Pull # 3 on this chart: