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Had anybody ever run these shorty headers with aftermarket heads? They are the only shorties I can find with 1.75" primaries. I am looking for a set of shorty headers that will be OK with the AFR195's. I am well aware that I will give up some performance with these vs. the Longtubes, but the ease of wrenching on the car is worth the price to me. Anybody have any results with these headers? Thanks!
--Calvin
I've been running them with edelbrock performer heads on an LT-1 (1993 coupe). As far as a performance gain I can't comment as I've never been on the Dyno. They are not a direct bolt in part. To hook into your EGR system the air tube on the driver side has to be cut and re-welded. Also the fitment between the header pipes and the mounting flanges are tight. I switched to ARP 12 Point fasteners. Then when you bolt them up to cylinder 7 & 8 they are a pain to get to. So, I cut and grinded a wrench to fit. It's now the special tool to remove and install. I also switched to the NASCAR type fasteners that are safety wired. As far as ease of maintenance I'd say there's little advantage, but helpful for probably starter replacement. Since you have those high flowing heads I would go with high flowing headers. Lately, I've been thinking about reconfiguring my top end for more flow. Especially since I'm running a supercharger. If you are like me and most and always want more power go for the long tubes. The only con to shorty's are probably the weight. The finish has held up pretty well too.
I also switched to high flow magnaflow cats and had to have more fabrication done to the piping for attachment to my CORSA exhaust. If you use the stock cats you may not have this problem.
If you go with these headers and need any advice just shoot me a PM.
My concern with the longtubes is simply access to the starter and tranny/bellhousing removal. This car is a track car (road course) and an extra 10-15 HP is not worth it given the amount of wrenching I do on the car. Now, if it is a 50 HP difference, then I might be willing to bite off the extra work. That's kind of what I was trying to figure out was how much I was giving up in the 4,000 to 6,000 rpm band where I spend most of my time. Thanks.
--Calvin