Will 1/8" 3mm inner Diameter silicone vacuum hose work to replace the plastic line supplied?

Yes, 1/8" 3mm inner diameter silicone vacuum hose should work with no issues with this gauge.

Does anyone know the drill bit size for the fitting, so I can drill the hole and get it ready?

The fitting comes separate in the box, its not attached to the vacuum line. Vacuum line is 1/8". If your drilling through firewall, get a 1/4" grommet, drill 1/4" hole, press grommet into hole, run vacuum line through grommet. The fitting comes with a sleeve that slides over the hose then fitting goes over sleeve, then tighten fitting to vacuum input on back of gauge. Once you get the gauge, the instructions are pretty straight forward as far as installation goes. Hope this helps. Good luck on your install!

Will the fittings supplied, thread into one of the 2 plugged holes in the top of the intake plenum of a GM '93 6.5 turbo diesel

1. The Bosch SP0F000050 Style Line Mechanical Boost Gauge Kit includes (1) adapter to connect the Kit’s nylon tubing to a 1/8 NPT hole, and (1) adapter to convert a 1/4 NPT hole to a female 1/8 NPT thread. If larger sizes of NPT pipe thread adapters are required they can be obtained at an auto parts or home improvement store.2. If the holes in the plenum have metric threads, Bosch offers the SP0F000009 Metric Adapter Kit. This Kit has adapters to convert M10, M12, M14, and M16 metric threaded holes to a female 1/8 NPT thread, to fit the adapter in the SP0F000050 Boost Gauge Kit.

What color is the backlighting?

Comes with just a regular colored bulb. White with a slight yellow hue. Careful with the vacumm tubing it comes with. It's kinda brittle.

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BOSCH SP0F000050 Style Line 2" Mechanical Vacuum/Boost Gauge (Black Dial Face, Black Bezel)

Product ID: 15459159

Details

Brand
Bosch
Item Weight
9.07 g
Item dimensions L x W x H
7.8 x 4.5 x
Material
Rubber
Number of Items
1

📏Standard 2" dial fits 2-1/16" openings

🔋12V internal backlighting for night visibility

⏱️270° sweep for precise readings

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Description

🚀 Boost Your Drive with Bosch Precision – See Every Power Move!

PRECISION AT A GLANCE - 270-degree sweep ensures ultra-clear vacuum and boost readings for real-time engine insight.
SEAMLESS FIT FINISH - Standard 2" black dial and bezel with removable mounting panel for a sleek, professional installation.
COMPLETE INSTALLATION KIT - Includes 72" tubing, fittings, and mounting hardware—everything you need to upgrade instantly.
TRUSTED BOSCH ENGINEERING - Backed by over 100 years of automotive innovation, delivering reliability and performance you can count on.
EFFORTLESS NIGHT MONITORING - Built-in 12V internal backlighting keeps your gauge visible and stylish during late-night drives.

The Bosch SP0F000050 Style Line 2" Mechanical Vacuum/Boost Gauge combines precision engineering with sleek design, featuring a 270° sweep for accurate 0-30 in. Hg vacuum and 0-20 PSI boost readings. Its standard 2" black dial and bezel fit most 2-1/16" openings, complemented by 12V internal backlighting for clear visibility day or night. Complete with 72" tubing, fittings, and mounting hardware, this gauge offers a straightforward, reliable upgrade trusted by professionals and enthusiasts alike.

Specifications

ASIN	B00UM9X2HW
Best Sellers Rank	#65,320 in Automotive ( See Top 100 in Automotive ) #2 in Automotive Replacement Boost Gauges #820 in Automotive Replacement Engine Parts
Brand Name	Bosch
Customer Reviews	4.3 4.3 out of 5 stars (488)
Global Trade Identification Number	00028851027281
Included Components	Gauge
Item Dimensions	7.8 x 4.5 x 3.5 inches
Item Weight	9.07 g
Manufacturer	Bosch Automotive
Material Type	Rubber
Model	SP0F000050
Number of Items	1
Part Number	SP0F000050
UPC	028851027281
Warranty Description	Manufacturer Warranty

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€ 100.50

Duties & taxes included

In stock

Sold byAmazon GreeceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Greece.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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