[Biturbos4] Turbos Reliability & Replacement Cost (was: 2000 S4 Running Hot)

docwyte@comcast.net docwyte at comcast.net
Wed Aug 31 23:36:04 EDT 2005

Can't say that I agree with this.  The chip is definately the best upgrade and should be the first thing you do.  I highly doubt the stock exhaust and dp's are going to flame out the K03's any faster than they will already with the additional strain of the boost from the chip.

A true dual isn't going to outperform a single 3" system like the Borla, you'll just have a lighter wallet.

I'd do a chip first, then exhaust, then piggie pipes.  You get 90% of the hp/torque gains with the piggies and don't spend the $1600 that aftermarket downpipes cost.  You also don't have to worry about fitment issues or CE lights.


-------------- Original message -------------- 

> Rohan, 
> Depending on your $$$....I would upgrade the exhaust (look at AWE, Milltek, 
> etc.) to a TRUE dual. The stock S4 exhaust is a bottle-neck - even for K03 
> turbos. I would then consider a chip (if u haven't done this yet). If you 
> purchase the chip first - the turbos will be spinning so hard (especially with 
> GIAC-X) that you will defintely get too much back pressure and potentially cause 
> K03 (turbo) failure. 
> stinfo/biturbos4 

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