11-02-2020, 11:46 PM | #1 |
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X5 40i - CG Precision DS-1 downpipe installed
Hey all
Have some great news to share - B58 downpipes are compatible with our cars! I installed the CG DS-1 recently and it's fantastic. About 20-30% increase in volume. https://g05.bimmerpost.com/forums/sh....php?t=1771926 |
11-03-2020, 09:06 AM | #2 | |
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11-03-2020, 03:29 PM | #3 |
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Lol really? As far as I could tell, no one could actually confirm that they had actually installed one!
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r33_RGSport12909.00 |
11-04-2020, 10:43 AM | #4 | |
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But, Evolution Racewerks and I been testing it and confirmed the fitment.
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11-18-2020, 01:34 AM | #6 | |
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Also, where did you buy the lowering springs and how is the ride quality? I have 20" wheels so really need the car dropped! |
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11-18-2020, 11:29 PM | #7 | ||
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Downpipe, I would go with Evolution Racewerks or RushPlux.
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11-19-2020, 03:26 AM | #9 |
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For the downpipe, I chose the CG Precision DS-1 because it seemed the best for no CEL. A lot of others will trigger a CEL. I didn't want to mess with O2 sensors. The other one you could look at is the Active Autowerke downpipe - they also guarantee no CEL.
https://x-ph.com/cg-precision-ds-1-h...npipe-bmw-b58/ https://x-ph.com/active-autowerke-aa...-b58-downpipe/ I got my eibach springs here : https://www.tunershop.com/shop/eibac...5-pro-kit.html So far they ride great. Comfort very similar to OEM and a nice 2cm drop. |
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11-19-2020, 09:49 PM | #10 | |||
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11-19-2020, 10:44 PM | #11 | ||||
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I've tested it on my G30 540 a year ago. H&R spring advertised at 1.4" drop for 40i. I think KW V3 is about 1.6".
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11-20-2020, 11:17 PM | #12 | |||||
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Can you pm me the price for the springs please? Shipped to 95133. Seems like the drop is the same as the eibach which are at 40mm/1.5" |
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11-20-2020, 11:54 PM | #13 | ||||||
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11-21-2020, 02:31 AM | #14 | |
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Exhausts will usually do nothing for performance, mainly just sound. |
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11-21-2020, 02:51 AM | #15 | ||
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Having said that, what gains are you seeing and did you notice the car getting louder? Any drone in the cabin? Do you think a stage one or similar engine enhancement chip is also needed along with the downpipe to get a true feel of the increase in the power when the turbo kicks in? |
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11-21-2020, 05:38 AM | #16 |
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Yes the car is definitely louder, by about 20-30% I would say. There no drone as it retains all the characteristics of the stock exhaust but it does wake it all up.
There's definitely an improvement in the mid and top end power with the downpipe, but yes a tune is needed if you're seeking a dramatic increase in power. With a downpipe, you can usually skip stage 1 and go for a stage 2 tune. |
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11-21-2020, 05:56 AM | #17 | |
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11-21-2020, 07:11 AM | #18 | |
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And yep got it from xph. |
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11-21-2020, 07:12 AM | #19 | ||
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