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Universal Fit

Need parts that work across platforms? Our Universal Fit collection includes components...

Universal Fit

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Welcome to WrenchIt — premium performance parts for serious builders.

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Collection: Mopar Small Block

Mopar Small Block specialists — featuring parts for 318, 340, and 360 engines. Designed to enhance performance and preserve the legacy of Chrysler’s small block power.

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205 products

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Speedmaster (205 products)

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205 products

Chrysler Dodge Big Small Block 318 440 Thermostat Housing Water Neck Billet

Chrysler Dodge Big Small Block 318 440 Thermostat Housing Water Neck Billet

Vendor:
Speedmaster

Regular price $36.50 USD

Regular price Sale price $36.50 USD
Chevy LS 4340 Forged Crankshaft ST-4.100 RJ-2.1 MRL-6.098 RMS-1Pc (10/10)

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Chevy LS 4340 Forged Crankshaft ST-4.100 RJ-2.1 MRL-6.098 RMS-1Pc (10/10)

Vendor:
Speedmaster

Regular price $750.10 USD

Regular price ~~$1,000.00 USD~~ Sale price $750.10 USD

Sold out
Ford 351W Windsor Forged 4340 Steel Crankshaft 3.850" Std-Seal External Bal.

Ford 351W Windsor Forged 4340 Steel Crankshaft 3.850" Std-Seal External Bal.

Vendor:
Speedmaster

Regular price $880.00 USD

Regular price Sale price $880.00 USD
Ford 351C Forged 4340 Steel Crankshaft 3.750" Std-Seal External Bal.

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Ford 351C Forged 4340 Steel Crankshaft 3.750" Std-Seal External Bal.

Vendor:
Speedmaster

Regular price $880.00 USD

Regular price Sale price $880.00 USD

Sold out
Ford 289 302 5.0L Forged 4340 Steel Crankshaft 3.400" Std-Seal External Bal.

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Ford 289 302 5.0L Forged 4340 Steel Crankshaft 3.400" Std-Seal External Bal.

Vendor:
Speedmaster

Regular price $1,466.00 USD

Regular price Sale price $1,466.00 USD

Sold out
Chevy SBC 350 Forged 4340 Steel Crankshaft 3.750" 2Pc-Seal Internal Bal.

Chevy SBC 350 Forged 4340 Steel Crankshaft 3.750" 2Pc-Seal Internal Bal.

Vendor:
Speedmaster

Regular price $875.00 USD

Regular price Sale price $875.00 USD
Chevy SBC 350 Forged 4340 Steel Crankshaft 3.750" 1Pc-Seal External Bal.

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Chevy SBC 350 Forged 4340 Steel Crankshaft 3.750" 1Pc-Seal External Bal.

Vendor:
Speedmaster

Regular price $670.00 USD

Regular price Sale price $670.00 USD

Sold out
Chevy LS Forged 4340 Steel Crankshaft 4.000" 1Pc-Seal Internal Bal.

Chevy LS Forged 4340 Steel Crankshaft 4.000" 1Pc-Seal Internal Bal.

Vendor:
Speedmaster

Regular price $1,175.00 USD

Regular price Sale price $1,175.00 USD
Chevy BBC 454 Forged 4340 Steel Crankshaft 4.250" 2Pc-Seal Internal Bal.

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Chevy BBC 454 Forged 4340 Steel Crankshaft 4.250" 2Pc-Seal Internal Bal.

Vendor:
Speedmaster

Regular price $845.00 USD

Regular price Sale price $845.00 USD

Sold out
Chevy 400 Forged 4340 Steel Crankshaft 3.750" 2Pc-Seal External Bal.

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Chevy 400 Forged 4340 Steel Crankshaft 3.750" 2Pc-Seal External Bal.

Vendor:
Speedmaster

Regular price $875.00 USD

Regular price Sale price $875.00 USD

Sold out
I Beam Pro 6.385" 2.200" .990" 4340 Connecting Rods Chevy BBC 454 w/ ARP 2000

I Beam Pro 6.385" 2.200" .990" 4340 Connecting Rods Chevy BBC 454 w/ ARP 2000

Vendor:
Speedmaster

Regular price $652.70 USD

Regular price Sale price $652.70 USD
I Beam Pro 6.200" 2.100" .927" 4340 Connecting Rods Chevy SBC 350 w/ ARP 2000

I Beam Pro 6.200" 2.100" .927" 4340 Connecting Rods Chevy SBC 350 w/ ARP 2000

Vendor:
Speedmaster

Regular price $635.00 USD

Regular price Sale price $635.00 USD
I Beam Pro 6.135" 2.200" .990" 4340 Connecting Rods Chevy BBC 454 w/ ARP 2000

I Beam Pro 6.135" 2.200" .990" 4340 Connecting Rods Chevy BBC 454 w/ ARP 2000

Vendor:
Speedmaster

Regular price $652.70 USD

Regular price Sale price $652.70 USD
I Beam Pro 6.125" 2.100" .927" 4340 Connecting Rods Chevy SBC 350 w/ ARP 2000

I Beam Pro 6.125" 2.100" .927" 4340 Connecting Rods Chevy SBC 350 w/ ARP 2000

Vendor:
Speedmaster

Regular price $635.00 USD

Regular price Sale price $635.00 USD
I Beam Pro 6.100" 2.100" .927" 4340 Connecting Rods Chevy SBC 350 w/ ARP 2000

I Beam Pro 6.100" 2.100" .927" 4340 Connecting Rods Chevy SBC 350 w/ ARP 2000

Vendor:
Speedmaster

Regular price $635.00 USD

Regular price Sale price $635.00 USD
I Beam Pro 6.000" 2.100" .927" 4340 Connecting Rods Chevy SBC 350 w/ ARP 2000

I Beam Pro 6.000" 2.100" .927" 4340 Connecting Rods Chevy SBC 350 w/ ARP 2000

Vendor:
Speedmaster

Regular price $610.00 USD

Regular price Sale price $610.00 USD
I Beam Pro 5.956" 2.310" .912" 4340 Connecting Rods Ford 351 Windsor w/ ARP 2000

I Beam Pro 5.956" 2.310" .912" 4340 Connecting Rods Ford 351 Windsor w/ ARP 2000

Vendor:
Speedmaster

Regular price $639.90 USD

Regular price Sale price $639.90 USD
I Beam Pro 5.933" 2.087" .866" 4340 Connecting Rods Ford 4.6L w/ ARP 2000

I Beam Pro 5.933" 2.087" .866" 4340 Connecting Rods Ford 4.6L w/ ARP 2000

Vendor:
Speedmaster

Regular price $615.00 USD

Regular price Sale price $615.00 USD
I Beam Pro 5.700" 2.100" .927" 4340 Connecting Rods Chevy SBC 350 w/ ARP 2000

I Beam Pro 5.700" 2.100" .927" 4340 Connecting Rods Chevy SBC 350 w/ ARP 2000

Vendor:
Speedmaster

Regular price $610.00 USD

Regular price Sale price $610.00 USD
I Beam Pro 5.400" 2.123" .927" 4340 Connecting Rods Ford 302 Windsor w/ ARP 2000

I Beam Pro 5.400" 2.123" .927" 4340 Connecting Rods Ford 302 Windsor w/ ARP 2000

Vendor:
Speedmaster

Regular price $639.90 USD

Regular price Sale price $639.90 USD
I Beam Pro 5.090" 2.123" .912" 4340 Connecting Rods Ford 302 Windsor w/ ARP 2000

I Beam Pro 5.090" 2.123" .912" 4340 Connecting Rods Ford 302 Windsor w/ ARP 2000

Vendor:
Speedmaster

Regular price $610.00 USD

Regular price Sale price $610.00 USD
H Beam 6.385" 2.200" .990" 4340 Connecting Rods Chevy BBC 454 w/ ARP 8740

H Beam 6.385" 2.200" .990" 4340 Connecting Rods Chevy BBC 454 w/ ARP 8740

Vendor:
Speedmaster

Regular price $570.00 USD

Regular price Sale price $570.00 USD
H Beam 6.200" 2.100" .927" 4340 Connecting Rods Chevy SBC 350 w/ ARP 8740

H Beam 6.200" 2.100" .927" 4340 Connecting Rods Chevy SBC 350 w/ ARP 8740

Vendor:
Speedmaster

Regular price $570.00 USD

Regular price Sale price $570.00 USD
H Beam 6.135" 2.200" .990" 4340 Connecting Rods Chevy BBC 454 w/ ARP 8740

H Beam 6.135" 2.200" .990" 4340 Connecting Rods Chevy BBC 454 w/ ARP 8740

Vendor:
Speedmaster

Regular price $570.00 USD

Regular price Sale price $570.00 USD

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