M5 E39 Group Buy Forum and Sponsor Discussion and OfferingsOnly Sponsors are allowed to post there offerings or one-time member offerings (That is one single and first group buy for a non-sponsor company's product). Also only sponsoring companies and members are allowed to post here.
from their website, it looks like welding will be required if one were to get the competition headers. the "regular" RD Sport headers, however, have flanges already welded in to bolt up the stock cats. i think I might drop by RD today and talk to them about the headers...
Welding will still be required if you maintain the stock cats. Since the oem exhuast system has NO flanges and is all welded together, you would have to break the welds by cutting pre-cat, weld on a flange from RD to the cats, and bolt the cat-back to the new headers. So in other words, welding is required no matter what.
Originally posted by BostonRocket Welding will still be required if you maintain the stock cats. Since the oem exhuast system has NO flanges and is all welded together, you would have to break the welds by cutting pre-cat, weld on a flange from RD to the cats, and bolt the cat-back to the new headers. So in other words, welding is required no matter what.
I checked out the RD competition heads, which cost two grand. How does these headers compare to DINAN's headers in shape and overall design??? Are they the same is one better than the other? Does anyone know? Lets say, the two mentioned companies offered their headers for just about the same price, would you choose one over the over? Now Im only talking about the quality of the product and its flow design and not affiliations with BMW or guarantees by DINAN. Lets forget all about this aspect of marketing.
got an update for you all: I stopped by RD Sport today and spoke with them about the headers. unfortunately, they didnt have either of the headers in stock for me to see personally (they are at their warehouse in germany). the gentleman i spoke with told me several things:
1) both sets of headers will bolt on and dont require any modification to the car (other than the welding of the cats)
2) the competition headers provide a low-mid range power gain, whereas their sport headers will net most of the power gains in the higher rev range
3) the headers are not a nowack design, nor is the RD Sport engine package a nowack design or any variant thereof.
4) if the group buy reaches a sufficient quantity the headers will be air freighted and will be here within a week of the end of the group buy.
i cannot verify the accuracy of any of these facts, just repeating what the representative of RD Sport said. hope this helps!
E 39: CB / Black - most tasteful options (fondly missed)
E 60: IB/Black - Everything except vented seats and split rears (gone)
997 C2S with X51 power kit: Black on black, most tasteful options I think
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