Back by popular demand - Full-Race is proud to offer their STI/WRX 1.5 scroll header/up pipe for Stage2 Subarus - the earliest spooling, fastest response and most hp/tq of any stock location header. The 1.5scroll system consists of their twinscroll lower manifold (the same one used on their legendary twinscroll turbo kits) and stock location 1.5 scroll up-pipe. Designed to optimize performance for a stock EJ engine and stock location singlescroll turbo, this up pipe uses a twin-tube configuration which locates the final 2->1 merge collector as close to the turbine as possible. The 1.5scroll combines twinscroll performance characterstics with the convenience, easy installation and OE appearance of the stock singlescroll turbo. Any stock or upgraded stock style turbocharger and aftermarket downpipe will fit - allowing you to retain all current mods. Compatible for RHD and LHD chassis.

Utilizing ideal cylinder pairing and the proper implementation of Twinscroll technology, huge increases at the low end, midrange and top end can be realized, all while minimizing spool time and improving throttle response. Proven to make substantial horsepower and torque gains, the 1.5scroll is the best performing AND the most versatile, allowing for an easy upgrade to twinscroll 35R or 40R. Simply unbolt the 1.5scroll up pipe and install a twinscroll up pipe/downpipe with external wastegates to convert to twinscroll. The Full-Race WRX/STI exhaust manifold is the last manifold your Subaru will ever need!]

With the availiblity of stock location bolt-on GT30R and GT35R, upgrading to a high performing stock location GT turbo is easier than ever. Driving a reliable, high horsepower Full-Race equipped WRX/STI, at an affordiable price is now a reality!

Full-Race twinscroll header
- Thick wall stainless steel construction
- Precision robotic TIG welding
- Lifetime Warranty for the original purchaser

Full-Race 1.5 scroll uppipe
- True twinscroll design up until the point of turbo.
- 1.5 Scroll design offers you huge gains over an open up-pipe.
- Up-Pipe shown with optional HPC coating.

Application Notes:
- Will not fit with Moroso oilpan (moroso pan can fit with slight modification)
- Will not fit with Cosworth oilpan (cosworth pan only allows stock manifold to be used)