Im debating whether or not to buy a GReddy SUS Header for my car. Now i know im not rly going to get much of any gain at all but i was wondering if your guys have had experience with this part or company. They def. seem to have a name but i wanna jsut double check cus the part is ~$400. So any adivice would be appreciated. Also Being 4-2-1 That means that any gain would probly be midrange right? as in RPMs. As opposed to the gain the 4-1 collection headers give at high RPMs... right?