JHM Tuning for B6-B7 S4 w 4.2L V8 (40v) [JHM-B67S4TU]
Date Added: Saturday 29 October, 2011
I am extremely satisfied with the JHM 91 Octane tune! The combination of 2.5" downpipes & exaust with the JHM tune has increased the power of the vehicle more than I thought it would, especially in the 4000-7000 rpm range. Most HP claims are wayyyy overblown, but for a realistic 25-30hp (exhaust + tune), I recommend this product.
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Some of these modifications and or parts are intended for off-road use only and may violate Federal or your State emissions standards. Also, end user assumes all risk with product performance and installation. JH Motorsports is not responsible for any bodily or mechanical harm, etc. as a result of use or misuse of any products.