BMW Internal Engine Parts for BMW 3 Series E46 (1999-2005)

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Rebuilding your engine or giving your cylinder head an overhaul? Internal engine components covers parts that are located within the engine block and cylinder head. Examples include: timing chains and tensioners, rocker arms, rod bolts and studs, head bolts, valve springs, connecting rods, and more. These are Genuine BMW engine parts, performance upgrades, or approved aftermarket brands that have a long track record of reliability and quality.

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S5X/M5X/M44/M20/M10- WPC Treated Rod Bearing Set - (Standard/Red Shell)
S5X/M5X/M44/M20/M10- WPC Treated Rod Bearing Set - (Standard/Red Shel...
10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!
ECS - Corporate Logo
T#:395066
Part#: 11241284849WPC
In Stock
Sale - Save 25% $ 188.99

This product was last offered at the strikethrough price on
11-07-2026

$ 141.74 USD
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Sale - Save 25%
$ 188.99

This product was last offered at the strikethrough price on
11-07-2026

$ 141.74 USD
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These WPC-treated bearings are the best we have seen! WPC is a shot-peening treatment at a microscopic level. It's perfect for sensitive surfaces like bearings. The WPC treatment removes imperfections and high spots, while creating a surface that retains oil better than the original surface. This greatly reduces friction. The bearings in this kit are original equipment KS bearings that are sent to WPC for treatment. The treated bearings are stronger with less metal fatigue and less friction than buying off-the-shelf bearings from the dealer.

This item fits the following BMWs: 
1984-1991 E30 BMW 318i 318is 318ic 325e 325es 325i 325ic 325is 325ix 
1992-1998 E36 BMW 318i 318is 318ti 318ic 323is 323ic 325i 325is 325ic 328i 328is 328ic M3 
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi
1982-1988 E28 BMW 528e
1989-1995 E34 BMW 525i
1997-2003 E39 BMW 525i 528i 530i
2004-2005 E60 BMW 525i 530i 
2004-2006 E83 BMW X3 2.5i X3 3.0i 
2000-2006 E53 BMW X5 3.0i 
1997-2002 Z3 BMW Z3 1.9 Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i M Roadster M Coupe 
2003-2005 Z4 BMW Z4 2.5i Z4 3.0i 

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S54/S5X/M5X/M20/M44 WPC Treated BMW Engine Crankshaft Main Bearing Set (Standard/Yellow Shell)
S54/S5X/M5X/M20/M44 WPC Treated BMW Engine Crankshaft Main Bearing Se...
10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!
ECS - Corporate Logo
T#:585720
Part#: 11211706847WPCKT
In Stock
Sale - Save 5% $ 250.99

This product was last offered at the strikethrough price on
11-07-2026

$ 238.44 USD
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Sale - Save 5%
$ 250.99

This product was last offered at the strikethrough price on
11-07-2026

$ 238.44 USD
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What's better than using new crank bearings in your next engine build? WPC-treated bearings! What is WPC, you ask? WPC is a surface treatment that reduces friction and adds strength - two improvements that benefit internal engine components. Ultra-fine particles are fired at the surface at very high speeds, like shot-peening - but much, much smaller. The parts come out smoother and stronger due to thermal discharge. The two largest enemies of any high-performance engine are heat and friction - and WPC has found a way to reduce both. What are you waiting for? Use WPC-treated bearings on your next engine build or crank service!
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Schrick Exhaust Camshaft - E46 M3, MZ3, MZ4 (S54) - 272 Degree, 12.5mm Lift
Schrick Exhaust Camshaft - E46 M3, MZ3, MZ4 (S54) - 272 Degree, 12.5m...
Schrick - Corporate Logo
T#:338215
Part#: TMS11749
Ships on Dec 18, 2026
Sale - Save 29% $ 3,042.99

This product was last offered at the strikethrough price on
11-07-2026

Starting at $ 2,165.97 USD
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Sale - Save 29%
$ 3,042.99

This product was last offered at the strikethrough price on
11-07-2026

Starting at $ 2,165.97 USD
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E46 M3 Schrick 272 Degree Exhaust Camshaft with 12.5mm valve lift. New rocker arms are required (BMW part #11337833259 or a new Schrick part).

BMW Schrick Technical Specs Schrick Technical Information / Specs

This item fits the following BMWs:
2001-2006 E46 BMW M3
2001-2002 Z3 BMW M Roadster M Coupe
2006-2008 E85 BMW Z4 M Roadster M Coupe
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Timing Chain - Upper
Timing Chain - Upper
10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!
Bavarian Autosport - Corporate Logo
T#:17871154
Part#: 11311432177
In Stock
Sale - Save 30% $ 27.99

This product was last offered at the strikethrough price on
11-07-2026

$ 19.59 USD
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Sale - Save 30%
$ 27.99

This product was last offered at the strikethrough price on
11-07-2026

$ 19.59 USD
Free Shipping on orders $49 and up
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Schrick Intake Camshaft - E46 M3, MZ3, MZ4 (S54) - 288 Degree, 12.5mm Lift
Schrick Intake Camshaft - E46 M3, MZ3, MZ4 (S54) - 288 Degree, 12.5mm...
Schrick - Corporate Logo
T#:338222
Part#: TMS3572
Ships on Mar 3, 2027
Sale - Save 63% $ 5,600.99

This product was last offered at the strikethrough price on
07-08-2026

Starting at $ 2,068.04 USD
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Sale - Save 63%
$ 5,600.99

This product was last offered at the strikethrough price on
07-08-2026

Starting at $ 2,068.04 USD
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E46 M3 Schrick 288 Degree Intake Camshaft with 12.5mm valve lift. Originally desinged for the M3 CSL but works great in a standard M3. A new rocker arm is required (Schrick or new BMW part #11337833259). This is a more agressive cam that the Schrick 280 degree cam that we also offer for the E46M3

BMW Schrick Technical Specs Schrick Technical Information / Specs

This item fits the following BMWs:
2001-2006 E46 BMW M3
2001-2002 Z3 BMW M Roadster M Coupe
2006-2008 E85 BMW Z4 M Roadster M Coupe
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Schrick Exhaust Camshaft - E46 M3, MZ3, MZ4 (S54) - 296 Degree, 14.0mm Lift
Schrick Exhaust Camshaft - E46 M3, MZ3, MZ4 (S54) - 296 Degree, 14.0m...
Schrick - Corporate Logo
T#:338219
Part#: TMS201492
Ships on Mar 3, 2027
Sale - Save 45% $ 7,065.99

This product was last offered at the strikethrough price on
07-08-2026

Starting at $ 3,897.86 USD
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Sale - Save 45%
$ 7,065.99

This product was last offered at the strikethrough price on
07-08-2026

Starting at $ 3,897.86 USD
Free Shipping
Add to Wish List
E46 M3 Schrick 296 Degree Exhaust Camshaft with 14.0mm valve lift. This is only for use in professionally-built E46 M3 race engines. Schrick has developed this ultra-aggressive S54 race cam with 296-deg duration and 14mm of valve lift. Because of the aggressive profile and specs of this cam, Schrick only recommends it be used with no VAN0S or with special custom pistons with deep valve reliefs. We strongly recommend this be professionally installed by an experienced engine builder to check clearances and fitment.

Schrick also requires valvetrain hardware to go along with this cam:
Schrick valve springs
Schrick rocker arms
Schrick upper and lower retainers

This item fits the following BMWs:
2001-2006 E46 BMW M3
2001-2002 Z3 BMW Z3 M Roadster, Z3 M Coupe
2006-2008 E85 BMW Z4 M Roadster, Z4 M Coupe
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