The factory intercooler on your N54 Z4 35i or 35is is sized for stock boost, and it heat-soaks fast once you start pushing more air through it. VRSF's HD intercooler line replaces it with a custom bar-and-plate core built to keep intake temps down, reducing the heat soak that costs power and raises the risk of pre-detonation and knock.Choose the core that matches your build. The 5" Stepped HD suits a stock-turbo, bolt-on car, holding intake temps to about a 4-degree rise over a 3rd-gear pull versus roughly 32 degrees on the factory intercooler. The 7.5" Competition Stepped HD steps up to a denser fin pack proven to support up to 850whp with only a 2-degree rise under the same conditions, and is VRSF's recommendation over the 5" core for most builds. For larger upgraded turbos above 850whp, the 7.5" Race core is built to support up to 1100whp and has been featured on record-setting N54 builds.Features Custom bar-and-plate core with a staggered, offset fin pack for maximum heat rejection CAD-designed, one-piece cast aluminum end tanks for improved flow and durability over sheet-metal designs Retains the factory fan shroud via built-in mounting tabs Hand-finished and pressure-tested for a leak-free fit What's Included VRSF intercooler core (5" Performance, 7.5" Competition, or 7.5" Race, as selected) Mounting hardware and couplers Product Specifications Fits: 2009-2016 BMW Z4 35i & 35is (E89), N54 5" Performance Core SKU / MPN: Z4-10903070 7.5" Competition Core SKU / MPN: Z4-10903040 7.5" Race Core SKU / MPN: Z4-10903050 Vendor: VRSF Frequently Asked QuestionsWhich core should I choose?The 5" Performance core suits a stock-turbo, bolt-on car on a budget. The 7.5" Competition core supports up to 850whp with less heat soak and is VRSF's general recommendation. The 7.5" Race core is built for larger upgraded turbos above 850whp.How much does this reduce intake temperatures?VRSF measured about a 4-degree rise on the 5" core and a 2-degree rise on the 7.5" Competition core during a 3rd-gear pull, versus roughly 32 degrees on the factory intercooler.Does this retain the factory fan shroud?Yes, VRSF builds in mounting tabs so the factory fan shroud bolts back on.
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