DESCRIPTION
Upgrade charge-air cooling with the do88 BigPack Intercooler Kit. BIG-290-S fits BMW 135i/335i/35i N55 (E9X/E8X) 10‑13.
The best BMW 135/335 E9x/E8x N55 performance intercooler and pipe kit on the market!
This comprehensive package includes our do88 performance intercooler, charge pipe kit, and turbo outlet hose, delivering unmatched performance and reliability. Designed for high horsepower builds, it ensures optimal airflow and cooling.
Upgrading just the intercooler brings noticeable improvements, but combining it with the charge pipe kit and turbo outlet hose provides even greater results. Our pressure pipes allow significantly better airflow than stock piping, improving reliability over time. Even stock cars benefit, as the OEM plastic pipes are prone to failure.
Advantages with do88 BigPack (vs OE intercooler/pipes):
- Greater core volume: 15,517 cm³ (OE: 6,933 cm³), 124% larger.
- Larger frontal cooling area: 1,151 cm² (OE: 658 cm²), 75% larger.
- Airflow at 0.15 bar / 2.18 psi pressure drop: 498 CFM (OE: 354 CFM), 41% higher.
- Peak power gain: 13 hp (measured on 335xi N55 with Stage 1 tune).
- Lower post-intercooler air temperature: 43°C (OE: 58°C), 15°C lower.
- Designed to handle high pressure and temperatures.
- Charge pipe features two methanol injection connections (1/8"-27 NPT) with blanking plugs included.
The BigPack includes the full aluminum do88 performance intercooler, upgrade turbo outlet hose, and a complete 3” (76 mm) throttle-body side charge pipe kit with silicone hoses. This kit replaces everything from the turbo outlet to the throttle body, dramatically improving airflow and cooling performance.
The do88 intercooler is all-aluminum with CAD-designed, flow-optimized cast end tanks and core. The turbo outlet hose is precision-made, with a CNC-machined adapter and high-quality silicone reinforced with 4 layers of aramid fiber for maximum durability. The charge pipes are 3” mandrel-bent seamless aluminum with CNC throttle body flange and high-quality 4-layer silicone hoses.
OE intercoolers and pipes were designed for stock power levels. After tuning or intense use, OE components may be exceeded. The do88 BigPack unlocks your vehicle’s true performance potential.
All necessary hardware is included for a hassle-free installation.
Vehicle Fitment:
Model: BMW 1-Series E82 E88
Model Years: 2010–2013
Engine: N55
Miscellaneous: 135i / 135is
Model: BMW 3-Series E90 E91 E92 E93
Model Years: 2010–2013
Engine: N55
Miscellaneous: 335i / 335iX
Model: BMW X1 E84
Model Years: 2012–2015
Engine: N55
Miscellaneous: 35i
TECHNICAL DETAILS
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do88 BigPack Performance Intercooler Kit, BMW 135i/335i/35i N54 (E9X/E8X) 07‑10
