I will present the steps taken during the installation process (but to sum it up before we go any further, this is simply NOT a bolt on process! Unless you present some fab skills, IMHO, you are better off just going top mount, or a bottom mount GT2871R or equivalent if you want to stick to a bottom mount setup)ġ) Manifold to Turbo installation/Fitment with water fitting on block Interference of the CRV or the integrated BOV with the block water fittingģ.ğlanged compressor inlet/outlet as compared to a 2bolt compressor inlet/3 bolt compressor outlet So in summation, below are the fitment issues typically associated with using a 6258 EFR on a stock location manifoldġ. However, several more issues are still present for installation and actually arose from trying to allow the manifold to not interfere with the block water fitting. To Note: The setup I bought was used the manifold was modified prior to my purchase in order to tackle some of the issues. Also, among other things, the EFR is a half Marmom V-Band outlet on the exhaust side (which in some cases is also referred to as a narrow V-Band). Also, as all know, this really is not a true bolt on affair as one of the main issues is that, depending on how you clock the turbo, the CRV (Compressor Recirculation Valve or the EFR integrated BOV), there is some interference with the block water fitting (see picture for reference for fitment with a stock manifold). This is a write up which goes somewhat in depth on MY PERSONAL installation woes of the Borg Warner EFR 6258 on a SR20DET 180SX Blacktop.Īs everyone knows, there has been lots of talk about how the EFR fits the stock location (read: bottom mount) SR20DET.
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