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Old 15th September 2003, 18:53   #11
ernie
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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...

ernie
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Old 15th September 2003, 20:22   #12
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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.

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Old 15th September 2003, 20:27   #13
540is
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I signed up !

If they are as they look on those pictures, I want them !

Don't mind some welding, the system I'am using is
custom from manifolds back anyway.
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Old 15th September 2003, 20:39   #14
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Quote:
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.

'Rocket
rocket,

thanks for the clarification!

ernie
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Old 15th September 2003, 23:31   #15
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No problem.

Try PMing Rallistas. He is going thorugh a similar situation with his header install.

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Old 16th September 2003, 00:42   #16
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question for you design experts...........

Hi Guys,
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.
Thanks.
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Old 16th September 2003, 03:23   #17
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Anyone on the board signed up for the headers yet?
At RD's site 3 people already have.
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Old 16th September 2003, 08:55   #18
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hey guys,

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!

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Old 16th September 2003, 09:01   #19
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Quote:
Originally posted by Keith97M3turbo
Anyone on the board signed up for the headers yet?
At RD's site 3 people already have.
Yes i signed up, I hope they don't ship the headers twice over the Atlantic since I am just a few hours from Germany. (Sweden)

Last edited by 540is; 16th September 2003 at 09:02.
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Old 16th September 2003, 10:41   #20
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Quote:
Originally posted by ernie
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

i cannot verify the accuracy of any of these facts, just repeating what the representative of RD Sport said. hope this helps!

ernie
Ernie thanks.. one thing puzzles me and it may be because it is 4:45am ... I would have thought the competition headers would give most of the power in the upper rev range..

Anyone have other ideas on this?

All in all, it seems like a good price.
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