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good luck on your quest. Just be aware on diminishing hp returns on $ spent.
1. headers options, ranked in approx cost hi to low
Supersprint, ARMAspeed, MMW, MXP, diy cut out cat
User mapleridge is also working of a new set
2. Exhaust- you will se gains if you remove the secondary catalytic converters. Other options are mostly for looks & sweet sound.
3. Tunes-
AA has one tune,used to be called stage 2
Othe companies are Eurocharged, OEtuning
They are all kinda equal for a car without the DISA manifold based on all dynos
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128i Sport 6MT converted to Euro 130i spec, 3.73 diff, tuned by evolve ~220 whp 207 wtq(ft-lb) SAE
In-progress: //M front arm, M3 rack, e36M lip Wishlist: Coils, n55 mnts, headers, LSD, e60 finn diff
"The 1-series is the last car that BMW engineered before the Germans, as a car-making culture, fell out of love with driving." - R&T 2013 135is
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