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Turner Motorsport has everything you need to upgrade your BMW through our stages of performance or to keep your car in peak condition with our range of the latest in proven OEM cooling parts. Upgrade your cooling system and engine performance with the selections below to give your BMW a performance and reliability advantage.

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N54 Turbo Boost Leak Tester - BMW 3-Series E9X N54 3.0L

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T#:641167

Part#: BMW-N54-CAP

In Stock

$ 49.00

This product was last offered at the strikethrough price on
10-22-2026

$ 45.99 USD

Limited Qty Sale

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$ 49.00

This product was last offered at the strikethrough price on
10-22-2026

$ 45.99 USD

Limited Qty Sale

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This Boost Leak Tester kit mounts inside both of the flexible intake hoses that lead to your turbo's compressor inlet flanges. You will need to remove the air box (or your aftermarket air filters) to expose the 2 intake pipes. Install the testers in each pipe and pressurize the system using the tire schrader with your tire inflation tool. The kit comes with the necessary caps to block the diverter valve return flanges on the intake pipes, also a cap to block the breather line at the bakc of the valve cover. Once the kit is installed, use compressed air to charge the system and you will see that both gauges read the compressor pressure you are filling with. You'll be able to test the turbo to the motor checking all leak points in between, including intercooler, clamped connections, intake manifold, divertor valves and the many random potential leak points. Note: Testing at the intake pipe, you may hear noise coming from the o-ring (at ~12 psi test pressure) that seals the intake pipe to the turbo inlet from debris. This is not a boost leak, these are not meant to see boost and not intended to be perfectly sealed, however hearing this hissing may be mis-diagnosed as a leak. In this case reduce the pressure. If no obvious leaks are heard in any other location, the test is complete and there are no significant leaks The gauge on the boost leak tester allows the user to: apply a safe amount of pressure to prevent injury or damage to the charge pipes or engine read how fast the system holds and bleeds air after removing the air source give a good comparison of compressor outlet air Vs. boost test air while pressurizing. The smaller the difference the lesser the air loss in the system Design Features: Plastic End Caps with 1/8" NPT threaded gauge port & fitting port Boost Gauges with 30 PSI / 1Bar Boost Gauge Universal Tire Schrader Valve (can be removed and tapped for 1/4" NPT thread fitting if desired) (2) Stainless Steel T-Bolt Clamps with Teflon lock-nut (3) Vinyl Caps for diverter valve return and valve cover breather

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407 Piece O-Ring Assortment

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T#:1809147

Part#: W5202

In Stock at Vendor

$ 21.99 USD

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$ 21.99 USD

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Nitrile Butadiene Rubber

Universal Valve Spring Compressor

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T#:1809130

Part#: W89409

Ships in 2 Business Days

$ 126.99 USD

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$ 126.99 USD

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For servicing overhead valve engine with cylinder head removed.

Piston Ring Comp 3-1/2" to 7"

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T#:2242223

Part#: W80573

Ships in 2 Business Days

$ 22.99 USD

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$ 22.99 USD

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Use to install pistons on most passenger cars and truck engines

3/8" Dr. 5/8" Extended Spark Plug Socket

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T#:2242226

Part#: W80533

Ships in 2 Business Days

$ 20.25 USD

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$ 20.25 USD

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Extended socket length reaches confined areas.

Autel Autolink AL329

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T#:2914116

Part#: AL329

Ships in 2 Business Days

$ 49.99 USD

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$ 49.99 USD

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OBDII Code Reader

Piston Ring Comp 2-1/8" to 5"

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T#:2242222

Part#: W80572

Ships in 2 Business Days

$ 21.99 USD

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$ 21.99 USD

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Use to install pistons on most passenger cars and truck engines

419 Piece Metric O-Ring Assortment Kit

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T#:641935

Part#: WLMW5203

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$ 19.99 USD

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$ 19.99 USD

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Many uses around the garage and home

6pc Hook & Pick Set

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T#:1855974

Part#: W942

Ships on Dec 15, 2026

$ 8.99 USD

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$ 8.99 USD

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Includes straight, angled and combination picks

Spark Plug Gap Gauge

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T#:1855998

Part#: W80535

Ships in 3 Business Days

$ 1.99

This product was last offered at the strikethrough price on
08-26-2026

$ 1.54 USD

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$ 1.54 USD

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Easy to read markings to set gaps quickly and easily.

Feeler Gauge Set

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T#:1809138

Part#: W125C

Ships in 2 Business Days

$ 9.99 USD

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$ 9.99 USD

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Thickness Gauge (32 Blades)

Battery Tender Plus Advanced Battery Charging System

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T#:49892371

Part#: BTT0210128

In Stock at Vendor

$ 69.99 USD

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$ 69.99 USD

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Oil Filter Cap Wrench - 76mm X 14 Flute

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T#:5095705

Part#: W54063

Ships in 2 Business Days

$ 5.99 USD

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$ 5.99 USD

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Service the most stubborn Oil Filters and Housings

Piston Ring Installer

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T#:1809133

Part#: W80575

Ships in 2 Business Days

$ 17.62 USD

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$ 17.62 USD

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Comfortable vinyl grip handles.

120 pc Fuse Assortment

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T#:1809154

Part#: W5368

Ships in 2 Business Days

$ 13.68 USD

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$ 13.68 USD

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A must for any toolbox.

MaxiSys Ultra

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T#:2914136

Part#: MSULTRA

Ships in 7 Business Days

$ 12,306.99 USD

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$ 12,306.99 USD

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The MaxiSys Ultra is Autel’s most ambitious diagnostics tablet designed to maximize technician intelligence.

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