Very nice sound indeed. Report back in a few months for a folllow up review

Just installed the same system on my 2011 Nismo last night. Quality - 8 out of 10. Very nice finish, 2 missing bolts, 1bracket welded on backwards (hidden). Fit - 9.5 out of 10. Had to remove a heat shield for the exhaust emmisions canister. Sound - 10 out of 10. Zero rasp. Zero drone. Mellow bass at idle and around town. NASTY at WOT. Perfect. For the money, it can not be beat. We will see how it holds up, but initially, very satisfyed with the purchase.

How's the ground clearance vs. stock?

It is a bit lower underneath the differential. I quickly discovered I can't go to a specific service station in my town due to their asinine 5 inch tall speed bumps. Didn't do any damage to the exhaust other then a scuff that wiped right off. The bumps were made of some composite material luckily. I have a steep incline into my driveway and haven't had any issues with that.


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ebay exhausts get the job done just fine

but they will rust very quickly

Thanks. Will keep an eye on the rust and report.

If it's a decent stainless steel grade with proper welding techniques, it won't rust more quickly than anything else.

its not its an ebay exhaust

Do you have any first-hand knowledge with the exhaust the OP purchased?

yes tons

fitment issues also go hand in hand with ebay exhausts but even the high dollar name brand ones also hav these time to time so....

the ebay exhausts from beluga, topspeed, j2, dna get the job done just great for the dollar

but will rust more and hav more fitment issues than lets say aam, gthaus, akrapovic

do your research and hav a budget and buy wat u want

I guess I'm asking if you've used or examined the J2 exhaust first hand. I've owned some pretty high end stuff in my time and it's not my first rodeo. I'm just curious (honestly) if you've put your hands on one of these exhausts or owned one for a period of time to make that determination or if it's just hyperbole.

yes ive already stated that

many makes of cars many types of exhausts

been in the game for 15+

Honestly, anyone who's been in the manufacturing game and has seen the strides made by overseas countries, especially China, knows there's very little difference if there are strict quality control protocols in place. The same thing was said about Japanese products, then later products from Taiwan and Korea, far more complex products.

We're talking stainless tubing that's robotically TIG welded in many instances. Pretty simple stuff these days that any qualified manufacturer, no matter of country origin, can pull off.

You'll get zero argument from me concerning more complex items like dampers. True JDM, European or US market high end dampers are going to be superior in both materials, engineering, experience and overall damping.

Now springs are a gray area. You see all of the Taiwan/Korean-based dampers using Swifts to "upgrade" the shocks. I can see where metallurgy technology might not have caught up in terms of long-term changes in spring rate/sag and rate consistency over the spring's length.

Obviously there are different grades of stainless and one can question the purity of the stainless being used. But I highly doubt you'll see any major corrosion in a truly stainless exhaust in say three years, even in the rust belt or along the coast, at least not any more than a factory system. So if I had to buy TWO systems in six years, I'd still be ahead by hundreds of dollars (minus the elbow grease to install the system).

These exhausts are mandrel bent, stainless (unclear what grade), thick flanges, decent welds and seem to fit well for the most part minus a bracket or two. I just think making a blanket statement they'll rust out is ill informed and not based on any actual facts. Sorry. But unless you've had the exhaust for three years (like one of the earlier contributors to this thread) there's no knowledge base to make an educated comment on something like that.

We know what it looks like externally. What I don't know is what does it look like internally? Are the perforated cores for the resonators as quality as what comes on the best from Japan? How bout the exhaust packing? Ceramic? Stainless wool not retained well that'll blow out over time? That crossover pipe...are the cuts flush or is the pipe sticking into the exhaust flow? We know these are copies of the HKS design, just how close are they in terms of critical measurements like piping diameter, muffler and resonator chamber length, etc...

The last thing anyone should worry about is it rusting out. Misplaced concern.

so we agree then a china exhaust is different than a japan exhaust which is also different than an american exhaust

all steel is different

all welds are different

so...

youre sayin everyone should only be buying ebay exhausts then bc it doesnt matter?

Ah no. Not saying that at all. I'm saying there are several grades of stainless and any manufacturer could use any of them. I'm saying mandrel bent tubing and tig welding is not rocket science. I'm saying worrying about rust is a waste of time as is making blanket claims about products you've never actually owned.