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E60 M5 / E63 M6 Stage II Engine Upgrade - Front Pre-Cat Delete & Rear Sport Cat Kit
E60 M5 / E63 M6 Stage II Engine Upgrade - Front Pre-Cat Delete & Rear Sport Cat Kit
Part #: E60M5-STAGE2-KIT
Applications: 2006 - 2008 (E60 E63)
The stock M5/M6 has a front set of catalytic converters ("pre-cats") that are integrated into the "headers". These produce a large amount of restriction, robbing your V10 of precious torque. To counter-act this, our kit replaces these restrictive front cats with "straight pipes" and incorporates a pair of sport catalytic converters further down the exhaust pipe - which unleashes big horsepower. To make this all work, our Stage II software (a reflash of your engine computer) is included. In addition to adjusting the V10's fuel, spark, and vanos maps to take advantage of the freer-flowing manifolds and cats, it also removes the top speed limiter and disables the rear O2 sensors (for no Check Engine light). Look at the dyno chart - this kit offers +40lb/ft torque over stock and +25 more horsepower - AT THE WHEELS ! This is power you can feel in every gear.

click to enlarge The gains from this kit, which we have personally dyno tested (see dyno chart) are just about equal to the gains we have seen on complete aftermarket header / sport cat systems that cost $11,500 (!!). This tells us that the BMW factory headers are efficient and the real bottleneck in the stock system is the pre-cats (which the aftermarket headers eliminate). As this kit requires welding of the straight pipes onto your stock headers, we suggest professional installation.
“Night and Day Difference…Wow, I didn’t expect to feel such a big torque gain! ” –Will Turner's reaction to this kit when he drove it after the mod.
Stage 2 software also available separately, and is recommended for cars that have aftermarket headers and/or cars where cats have been completey removed. We have seen gains of 14hp and 12lb/ft of torque at the wheels on cars with headers and straight pipes after they install our Stage 2 software - and agin, no check engine lights.

This part alters or deletes the emissions equipment on your car. Because of this, we require a waiver of emissions compliance to be signed and sent in to TMS. You can download the waiver here.

Click here for specific instructions on shipping the computer.


Price:  $7,995.00
Sale Price: $6,995.00
Savings: $1,000.00
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