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Here's a full dyno test of various air filters and the complete Eventuri intake that GRP conducted recently. They have both K&N and a dry high flow filter that can be used without oil or other modifications that increased flow...

This is how it works in California and the exactly the process my dealer followed

A test drive is worth a thousand words but odds are that you'll love the Emira. I recently purchased a V6 MT First Edition and couldn't be more pleased. I've had a 997.1 Carrera with a manual and a 991.1 GT3 with PDK. I love 911's and will likely own another but when I looked at the cost of...

Thanks Greg, this is extremely valuable work! One thing to keep in mind is that a dyno can't fully simulate the conditions of actual driving and it's likely that more cold air would be available to all intakes and filters tested in real world driving. That said, the conditions were the same...

Thanks, that's helpful!

I just received the Antigravity T-6 - 40 AH battery from GRP and I'm getting ready to install it. The panel is easy to remove and the battery clamp comes off with two bolts. Is there any trick to removing the factory harness to get access to the battery terminals? Does the battery need to be...

Hey Greg, I'm considering your titanium exhaust system. Is there an ETA on the dyno figures post installation?

Yeah, this was installed by the dealer on a new car. They definitely applied the "Lotus tax" and that was more than I was willing to pay for the convenience of having it done from the start. I couldn't make a deal on that car but ended up finding one closer to my spec at MSRP so it all worked...

Hey guys, I'm looking at a car with the Milltek exhaust already installed by the dealer. This is a $2,300 exhaust system from GRP but the line item on the sticker is $5,000. The explanation is that installation is labor intensive. Hard to imagine this job could taker longer than 2.5 to 3...