I've searched the forums and read reviews but it wasn't really helpful in my decision for buying a exhaust system. But I want to know if installing the 3.5" TBE will cause boost creep? Or what kind of exhaust are you guys running that you feel comfortable with so far? I got a deal for the TBE for $1100 and can order it anytime but I'm open to suggestions.

 

Well I did a little of research and this is what i found about the ....

APS DR Series 3.5" Turbo to Tip Race Exhaust:

The worlds first bolt-on 3.5" Stainless Steel (304) turbo to tip race exhaust designed for 600+ horsepower. Minimal exhaust back pressure, fast turbocharger spool-up and maximum horsepower is guaranteed.
The APS DR Series 3.5" Turbo to Tip Race Exhaust is a true 3.5" internal diameter exhaust system through each and every section. By utilizing the latest technology precision mandrel bends with the smallest possible bend angles spread over the maximum possible length, optimum exhaust gas flow minimum exhaust back pressure is achieved.

By dissipating the hot exhaust gasses more efficiently, the APS DR Series race exhaust lowers the thermal load on vital engine components such as pistons, combustion chambers, valves etc., particularly at high horsepower levels. Another significant benefit of the DR Series race exhaust is better transfer of exhaust gas energy to the turbocharger which results in faster turbocharger spool-up and more efficient turbocharger operation at high power levels.

A great deal of development effort has also been put into accentuating the deep Subaru boxer engine note - this exhaust is not for the faint hearted and guaranteed to excite!

The comprehensive APS DR Series 3.5" Turbo to Tip Race Exhaust system includes the innovative APS High Flow Turbine Outlet manufactured from Ni Resist iron, 3.5" internal diameter 304 grade down pipe, 304 grade 3.5" internal diameter intermediate pipe with true 3.5" internal diameter resonator, Highly polished 304 grade 3.5" muffler and tip assembly, all mounting hardware, gaskets, stud, nuts etc. for easy installation.

All US Specification WRX and STI vehicles

NOTE: Installation of this exhaust system may affect exhaust emissions. Consequently, APS recommends this system be installed in vehicles intended for off-road or competition use only.


Selecting your APS Exhaust System
"How much horsepower will that exhaust system add?"

This is an often asked question, to which there is no real answer. An exhaust system is only a point of possible restriction, which needs to be reduced as required.

For example, in a best case scenario, total removal of the complete turbo back exhaust system from a stock MY01 225 hp WRX will result in a power increase of approximately 20 hp. On the other hand, on a 425 flywheel hp WRX, utilization of the correct exhaust system would literally represent 65 of the 200 hp increase over standard.

A good starting point for the correct choice of an exhaust system, the following should be used as a useful giude:

Street Use - Legal Emissions/Noise - Less than 4.0 psi back pressure
Street Use - No Legaility Issues - Less than 2.5 psi back pressure
Race Use - As low as possible, however no more than 1.0 psi back pressure
The following chart provides exhaust back pressure data for a given engine power level for the stock WRX exhaust system as well as the range of APS High Output exhaust systems. In addition, the chart provides exhaust noise test results as per the SAE J1169 noise test.

Selection of the correct WRX or STI exhaust systems is the appropriate combination of back pressure, catalytic convertor and noise to suit the engine's power output. The bottom line is, if this data cannot be provided by an exhaust manufacturer, look elsewhere.

Hope that would help you a little.....

thunder_sti

 

I've read that already from aps-wrx.com didn't really help. I'm also from hawaii thunder_sti and heard that no one has installed one over here yet. So I was thinking of buying one and installing it in my STi. If anyone has this installed in their car what would be your suggestion on it?

 

Kool....

 

I have the APS 3" single tip TBE. I absolutly love it. IMO best sounding exhaust I've heard. Many have said that they really like the tone throughout the RPM range. Fitment and build quality again is the best I have seen. The welds are beautiful!!! As for performance, I performs like a TBE. IMO a 3 1/2" exhaust is way overkill. You simply do not need that much pipe under there. The tip, what is it like 5" or something? Do you really want that thing lunking around? I would suggest saving a few clams and picking up the 3" TBE. Your on the right track if you a shopping for APS. I have purchased a few of thier products, and I continue to be amazed by thier quality, customer service, and passion for making subies go fast.

 

I'm looking at picking up the 3.5" as well...trying to find a source that has it available at the right price...

several members from Hawaii have purchased this: all the ones that I know of have moved away...

Nate
Carlo
and another person I think his name was Dan?

It's a mean sounding exhaust...I heard mainly Carlo's...he use to live down the street from me...

Loud, fireball throwing...using the stock manifold. I have the XXTuning header now (same as the GT Spec II header)...there is an actual video/soundclip of the APS 3.5" w/GT Spec header...sounds good...

He and Nate built up their STI's...

here is the link to the clip

http://www.rallysportdirect.com/shop...5exhausthi.WMV

 

i second this .i have a aps 3'' TBE CATLESS on my sti ,and don't feel that going to 3.5'' will generate any real benefits.aps rules.

 

Man Island Style that was an awesome video. I've already emailed Revolution808 about ordering a TBE from them. Yeah finding a cheaper price was hard but Rev808 has it at a pretty good price and they would install in your car also in about an hour they told me. For what I know that 3.5" TBE would be an easy fix it ticket if I were to get caught cause I think its higher than the legal sound limit of 95db.

 

Let me know if and when you get it...should be awesome!

 

hopefully it will be in on either Saturday or Monday...installing soon there after...

I'll let you guys know how the install goes and if there are any problems...

 

[QUOTE=For what I know that 3.5" TBE would be an easy fix it ticket if I were to get caught cause I think its higher than the legal sound limit of 95db.[/QUOTE]

It does come with a silencer...just have to be observant and play it cool around the "popular" areas...heh heh

I don't think it is that loud though...it's hard to top the Blitz Nur Spec and TurboXS RFL ti (and that was a 2.5" axle back using the stock mid-pipe)...Sounded very nice...

Just spoke with a guy I met...he said with the silencer (it's adjustable), in the most restrictive setting (basically the exhaust goes from 3.5" to a 1.5" exit or so like most silencers for the canister type of exhaust)...he says it is almost like stock but of course the performance suffers. Adjust the silencer to it's most open position and it get louder and equates to about a 2.5" opening...4.5" is the actual opening without the silencer...

I am really getting curious now as to how loud this is...maybe I'll take a few clips when I get it installed: Unless somebody can do this for us now...

1. Silencer fully closed
2. Silencer fully opened
3. No Silencer

 

just put mine on last week.

it is loud without the silencer but i've been running stock for a year and a half. anything is louder than stock.

 

where you at? Volume-wise...what does it come close to? HKS? TurboXS? I am assuming you have an STI...

Just curious...Carlo and Nate both had APS 3.5" exhaust but I can't remember how loud they were...then again, if I don't remember, like I do some of the members here in Hawaii...maybe it wasn't so loud...

Any input would be appreciated...silencer in...does it make that big of a difference?

 

actually there were 3 people that had this on their car.... in their opinion- one of the best exausts ever used. i seen it, heard it. never drove it or seen "numbers" on it. only butt dyno reports.

one comment- it's HELLA BIG-



aloha from the summit of *-^-Mauna Kea-^-*

 

I have the APS 3.5" on my 05' STi and the angled look with the polished metal and the sound is unbeatable. I haven't seen another exhaust that looks or sounds as nice as the APS.

The APS is not AS loud as the other exhuasts, but thats because loud does not necessairly mean that it will sound good.

Don't get me wrong, its loud, but like I said, nothing sounds as sweet. The WRX always seems to be a little louder than the 2.5 liter, but I enjoy the exhaust tone for both the WRX and STi with the 3.5"

With any catless exhaust you are going to get boost creep, and the 3.5" is the least restrictive exhaust on the market. I would suggest that you have the car tuned with an EcuTek or get it Protuned.

My tuner LOVES my 3.5", he always comments how much quicker boost comes on than all the other tunes he does because of the DP design, and he loves the ease of tuning boost. The damn thing fits better than stock to boot! I get full boost at 2900 rpms and full torque (300 wtq.) at 3500 rpm. It was protuned just recently, but check out www.eqtuning.com for my StreetTune. We haven't dyno'd it since the Street Tune, but I am sure I picked up a bunch more power.

Good luck, you can't go wrong at 1100 dollars new either! These exhausts can be found for about 850-900 used, you've just got to look around.