Engine
Mechanical
Our forged pistons and billet rods are designed as direct replacement for the OEM pistons and rods. The pistons use a wrist pin that is stronger and of a better...
$9,299.00
Weistec has exclusively partnered with ARP, the top name in performance engine hardware. Head studs are used to fasten the heads to the block in place of the fa...
$1,769.00
The main bolts of the M157 engine are torque to yield bolts, making them one time use bolts. When assembling an M157 engine, new main bolts must be used to ensu...
$939.00
Performance
RENNtech M157 Biturbo ECU Upgrades are TÜV approved!
Our proprietary ECU upgrade for the Mercedes M157 engine offers huge gains in performance...
$3,495.00
We are proud to announce our new high-performance Auxiliary Radiator upgrade for M157/M278/M133. Designed specifically for enthusiasts who demand superior cooli...
$379.99
The Weistec ASV/WM Injection System adds multiple beneficial components to the M157 BiTurbo 5.5L engine. First being the addition of a Weistec Anti Surge ...
$3,599.00
Weistec Engineering is pleased to release the M157 W.3 Turbo Upgrade. We have developed proprietary aerodynamics designed to optimize extreme pressure operation...
$4,999.00
Software
Stage 2
+211HP, +321TQ
As an industry leader in tuning and calibration, Weistec Engineering is proud to introduce the much anticipated ECU tune for the bi...
$2,099.00
Stage 1
+166HP, +246TQ
As an industry leader in tuning and calibration, Weistec Engineering is proud to introduce the much anticipated ECU tune for the bi...
$1,899.00
Turbocharger
The Weistec ASV System adds a Weistec Anti Surge Valve (ASV) to the BiTurbo AMG M157 and M278 engines. From the factory the M157 engine was never given an...
$2,199.00