Red Star Downpipes
I'm reading the spec sheet on these and they seem to have the same converion/cleaning rate as regular 400 cell ones but I'd like to get some evidence ..
@shardul
Last edited by Nahhas26; Apr 17, 2021 at 02:10 AM.
Build quality was great. Fitment was spot on.
Fun factor was very similar to the Weistec catless pipes I had prior to swapping. Same aggressive sound result (just less turbo spool noise). Very happy with this product.
They texted order updates and made sure you knew what you were getting. Package came properly packed.




Build quality was great. Fitment was spot on.
Fun factor was very similar to the Weistec catless pipes I had prior to swapping. Same aggressive sound result (just less turbo spool noise). Very happy with this product.
They texted order updates and made sure you knew what you were getting. Package came properly packed.
300CELL does not trigger any CEL lights.
The Best of Mercedes & AMG
Shardul, can you PM me a quote for GESI catted downpipes for a 2014 W212 w/ and w/o heatshields?
https://redstarexhaustusa.com/merced...dy_style-sedan
Shardul, can you PM me a quote for GESI catted downpipes for a 2014 W212 w/ and w/o heatshields?
If i was to get a RennTech tune, would that throw a CEL with it or does it throw a CEL or in other words, is renntech tune compatible with this product?
I have the Renntech intermediate and the 300cell DPs...every now and then i'll hit a CEL for heat exchange on o2 but it cycles away just fine- I had may inspections and it passed.
To answer op questions
Quality? Very good
Sound? 15% louder than stock
Performance? Depends on ECU calibration etc
Fitment? Very good
Attached is a pic of a catless RS set I sold a month ago

Can I get a quote on these
To answer op questions
Quality? Very good
Sound? 15% louder than stock
Performance? Depends on ECU calibration etc
Fitment? Very good
Attached is a pic of a catless RS set I sold a month ago

To answer op questions
Quality? Very good
Sound? 15% louder than stock
Performance? Depends on ECU calibration etc
Fitment? Very good
Attached is a pic of a catless RS set I sold a month ago

Also, any difference between the 200 or 300 cell options? I want max performance, but don't want the stink either!
Build quality was great. Fitment was spot on.
Fun factor was very similar to the Weistec catless pipes I had prior to swapping. Same aggressive sound result (just less turbo spool noise). Very happy with this product.
They texted order updates and made sure you knew what you were getting. Package came properly packed.

E63 Biturbo, UPD Cold Air induction kit, UPD performance crank pulley and UPD adjustable rear suspension with ride height adjustment.
CL55 UPD Cold Air Boost kit, UPD 3000 stall converter, UPD 77mm SC clutched pulley and beltwrap kit, Custom long tubes, UPD crank pulley , UPD suspension kit, UPD SC pulley, Aux. HE, Trunk tank w/rule 2000 pump, Mezeire pump, UPD 5pc idler set, Aluminum rotor hats.
www.ultimatepd.com
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I'd recommend starting your own thread to keep the topic tidy.








