Billet Aluminum Turbocharger Coolant Line Fittings for Mercedes M278 and M157 Engines

from $319.00

Fix It For Good, The Easy Way

Enjoy peace of mind by perma-fixing those crack-prone turbo coolant lines on your M278 or M157 engine with these billet aluminum upgrade fittings, whilst also enjoying an easier installation process! Replacing these lines the conventional way is very difficult due to lack of access to the driver (left) side fitting bolt on the turbocharger.

Please see product details below for which kit you need. If in doubt, please contact me using the form to verify fit.

NOTE: GL550/GL450/GLS550/ML550 cars use an additional fitting (P/N 2782001000) which is not available in this kit, but available in full-aluminum construction from Rein (P/N CHU0719) which I recommend be purchased separately from a reputable distributor.

Pick Style Kit:

Fix It For Good, The Easy Way

Enjoy peace of mind by perma-fixing those crack-prone turbo coolant lines on your M278 or M157 engine with these billet aluminum upgrade fittings, whilst also enjoying an easier installation process! Replacing these lines the conventional way is very difficult due to lack of access to the driver (left) side fitting bolt on the turbocharger.

Please see product details below for which kit you need. If in doubt, please contact me using the form to verify fit.

NOTE: GL550/GL450/GLS550/ML550 cars use an additional fitting (P/N 2782001000) which is not available in this kit, but available in full-aluminum construction from Rein (P/N CHU0719) which I recommend be purchased separately from a reputable distributor.



Fitment & Kit Selection

One kit needed per vehicle. Use the chart below, inspect your engine, or contact us to determine the correct style.


Kit Contents


Installation video as shown on an M278 engine that calls for Style A fittings

Easier Installation Compared to OEM Lines!

Replacing turbo coolant lines the conventional way requires removing the bolt holding the turbo line to the left turbo, which is notoriously difficult to remove due to lack of access. This kit allows you to bypass the need to remove this bolt, because it only replaces the section of hose known to fail.

For detailed step-by-step instructions on how to do this job yourself, refer to the video on the left.

DISCLAIMER: This kit is designed to make replacement easy by only replacing the section of coolant line known to fail. This allows the section not known to fail to stay in place. Therefore, please understand that this kit works by modifying the existing line-set, rather than replacing the entire piece. By purchasing this product, the buyer acknowledges that the buyer is responsible for proper installation and subsequent inspection of the product and vehicle either through careful DIY install or by a professional mechanic. Sheer Performance LLC has done its due diligence in meeting or exceeding OEM products and is not responsible for any damages caused to the buyer’s vehicle due to negligent use or improper installation.


Materials

  • Fittings: Aluminum alloy, 6061-T6, anodized

  • Hoses: EPDM tube, synthetic fiber knit reinforcement, EPDM cover

  • Screws: Stainless steel and zinc-plated alloy steel

  • Worm Drive Clamps: Stainless steel band and screw

  • Constant Tension Clamp: Spring steel, 51CrV4

  • O-Rings: FKM


Limited Warranty

Orders as of March 1, 2026:

Aluminum fitting bodies are warranted against defects in materials and workmanship for a period of two (2) years from the date of original purchase by the end user. Consumable components, including but not limited to elastomer O-rings, seals, gaskets, and similar wear items, are not covered under this warranty. During the applicable warranty period, the manufacturer will, at its option, repair, replace, or refund the original purchase price of any aluminum fitting body determined to be defective under normal use and service. If repair or replacement is not commercially practicable, a refund may be issued. This warranty does not cover damage resulting from misuse, abuse, improper installation, modification, accident, neglect, corrosion, normal wear and tear, or use outside the product’s intended application. This warranty is limited to the original purchaser and is non-transferable. No other warranties, express or implied, are made except as required by law.


Questions or inquiries? Please fill out the form below and we will do our best to help!