ATP Turbo Bolt-On GT3076R Turbo Subaru 2002-2007 WRX / 2004-2019 STI

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ATP describes the GT3076R as "the right tool to do 500+ HP job." This turbo can support 500+ horsepower on the 2.5L. While the 3076R has a little more lag than the smaller units (it makes boost about 400RPMs later than the GT3071R), but it makes more top-end power. We do not recommend this turbo for 2.0L cars, unless they are full-race, built-block applications with head work. ATP's WRX & STi GT3076R is the modern "GT30R" and not the sporatically named -10, -11, -12, -13, -14 series from the old days misused and abused as "GT30's". If you're looking for a 500hp turbo for your WRX or STi that is streetable, and has a decent powerband, look no further. The GT3076R has a 60mm turbine wheel with an 84 trim and 76.2mm, 56 trim compressor wheel

In addition, ATP reccomends a higher flowing 3" turbo inlet, like the Perrin, Agency Power or APS. If you must use a stock-sized inlet, you will need to source a 2.4" to 3" reduction coupler, as the ATP turbos have a 3" inlet.We recommend using a matching-sized 3" inlet for minimal restriction, since GT turbos thrive with minimal inlet obstruction. ATP's tests have shown that these turbos, when used with the stock sized 2.4" inlet, produce significantly less power than when used with the 3" inlet. When coupled with a 3" downpipe, the 3" inlet promotes faster spool, and higher power numbers with less pressure at the manifold.


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