Element Tuning Turboback Exhaust for 02-07 WRX/STI

The Element Tuning exhaust system is like nothing on the market and is 5" of T304 stainless steel goodness! The system has already proven its worth taking our GT65 bolt-on turbocharger to 512 whp and a NASA Unlimited Class Time Attack win. What separates our downpipe from the rest is that we chose to do something new with the divorced wastegate design.  I penned this design almost 5 years ago but finding a manufacturer to produce the system with the quality we wanted proved difficult until now. 

Since the majority of Element Tuning customers have extensive modifications such as larger bolt-on turbochargers like the GT52 or GT49 we designed this exhaust system to exploit that by running the 3” dowpipe’s centerline on the exhaust wheel and the 2” wastegate dump tube’s centerline with the wastegate flapper valve.  The other item we altered from the norm was a divider at the turbocharger flange.  The reason we did this was that we found in testing that it hurt wastegate performance since the majority of the aftermarket turbochargers swing open in a fashion that dumps wastegate exhaust directly into the divider hurting flow.  This is often why “bellmouth” designs have better boost pressure control.  Also by forgoing this divider, the system will work with turbochargers that have a divided exhaust housing from the factory. 

The exhaust system is designed to deliver a smooth tuned deep base sound any Subaru Boxer engine lover is sure to enjoy!  Critical muffler design and a large straight through resonator provide unrestricted power and flow while keeping sound levels moderate and drone out.  For those who want to keep things as quiet as possible a muffler tip silencer is included free with every full exhaust or cat-back system. 

The two piece downpipe design allows us to adapt this exhaust for use in newer applications but more importantly it allows us to offer a bolt-in 50 state legal catalytic converter in the most ideal location for maintaining maximum HP.  We'll continue to test various catalytic converters and when we find one that maximizes flow we'll offer this as an option for those who would like to remain "green" or want extra noise suppression.

Fits WRX/STi 2002-2007

ELT-TBE-Sub: $1098 (Complete Exhaust System)

ELT-DP-Sub: $449  (Downpipe and no-cat pipe to be used with a cat-back or OEM exhaust)

ELT-CBE-Sub: $649 (Cat-back exhaust system to be used with OEM or aftermarket downpipe)

This was the maiden voyage for our GT65 stock location turbocharger and the production Element Tuning Turbo-Back Exhaust and for being internally gated, 512 whp is pretty impressive.  Not only did it impress on the dyno but also took the NASA Time Attack Unlimited class (TTU) win on both days at Virginia International Raceway. 

The fuel used was Sunoco 110 and also the Hydramist was injecting windshield washer fluid rated at -20C.  Peak power toped out at about 6400 rpm where boost was 23.4 psi, the AFR at 11.7, and ignition timing at 25 degrees in the Hydra data log.  This is pretty conservative but it's my road racing map.  For drag racing with a fuel such as VP C16 we could pick up about 15 hp.  While the peak boost hit 26.4 psi it was not holding all the way to redline but for an internally gated turbocharger it was doing really well and in the “real world” it holds quite well.  Spoolup is decent but ever since I installed the Cosworth cams I’ve lost about 300 rpm of my spoolup that I just can’t seem to regain with tuning of the AVCS.  Running 1000cc RC fuel injectors and the Hydramist water injection kit fuel injector duty cycles were nice and safe at 78%. 

Modifications: 

Engine: Element Tuning Pro Time Attack Motor:  Element Forged H-Beam Rods, Element Custom 2618 Forged Pistons

Heads: Element Tuning Valve Springs, Cosworth Camshafts

Intake: 3” Silicon inlet, Subaru RS Intake Manifold

Element Hydra EMS 2.6
Element Hydramist Water Injection
Element GT65 Bolt-on Turbocharger Internal WG

Element Full 3” Turbo-back Exhaust System
Element 4-1 Header
Element Fuel Surge Tank
Aeromotive A1000 fuel pump
TurboSmart E-Boost 2
TurboSmart Megasonic BOV
Clutch Master’s Element Spec Clutch
RC 1000cc Low Impedance Fuel injectors
Custom Fuel Rails
Ported TGV Housings
Front Mount Intercooler core, Element GT65 piping kit
JIC Suspension custom valved and sprung for Element Tuning

Prodrive GC010 18x9.5 Wheels

Hankook Ventus Race Tires 275/35-18

Seibon Carbon Doors, Hood, and Trunk

Sparco Seats, Steering Wheel, and Harnesses

StopTech 355mm BBK

Thanks,

Phil Grabow

www.elementtuning.com

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