Stock vs. Aftermarket Airbox Comparison - Boost

Making a case for the stock airbox

Background: In a previous post, I discussed comparing the Mk7 GTI stock intake with some modifications using a BMC aftermarket panel air filter and a Mann OEM air filter. Performance differences attributable to the air filters were negligible. The next logical comparison is of the Mk7 modified stock airbox, using the OEM filter, with an

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MGM7 Beta-11 Intake

MGM7 Beta-11 Intake Flow Test

Background: In the previous post on the MGM7 intake development, I discussed finding that the Beta-9 intake with a 3″ outlet flowed more than the Beta-10 intake with a 3.5″ outlet. I guessed that this was because the Beta-10 intake maintained a large diameter until just before the transition to the turbo inlet elbow and

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