Description
Wiseco Chevy Small Block Pro Tru Street 4.165in Bore Piston Kit
Our Pro Tru Street series pistons are forged from 4032 alloy aluminum in Mentor, Ohio and includes rings, pins, and clips for an all-inclusive rebuild. For any build budget, Wiseco has the piston to get you on the road or down the track.
Additional Information
Wiseco Chevrolet Small Block Piston Set, 4.165 in. Bore, 1.125 in. Compression Height, 0.927 in. Pin Diameter, Pro Tru Street, Set of 8.
Part Type
Engine Piston Set
Product Overview
Our Pro Tru? Street series pistons are forged from 4032 alloy aluminum in Mentor, Ohio and includes rings, pins, and clips for an all-inclusive rebuild. For any build budget, Wiseco has the piston to get you on the road or down the track.
Data: v2 - Desc: v4.2 - Upd: 2026-11-08 09:44:20
Features
- 4032 Forged Aluminum
- ArmorGlide Skirt Coating: Seizure resistant, Friction Reduction, and Quieter Operation
- AS-Forged Dome with Crown Features & Oil Drain Backs
- Chromium Alloy Steel Piston Pin & Spirolox Included
Note for Pistons, Rings, Rotors, Rods and engine internals
Unless otherwise specified, some brands supply brake rotors, pistons, strut mounts, rods and rings separately. In some cases, titles may indicate plural, or 'set' - eg the term “ring set” often refers to the rings for a single piston only. If you’re unsure about what’s included with this product, please contact our team for clarification.
(keyword: piston)Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.
Specifications
Product Details
| Bore Diameter: | 4.165 |
| Category Hierarchy: | Auto>Pistons>Piston Kits>Domestic>Pro Tru Street |
| Compression Height: | 1.125 |
| Description: | Wiseco Chevy Small Block Pro Tru Street 4.165in Bore Piston Kit |
| Engine - Web: | Small Block Gen I |
| Engine Type: | ICE |
| Engine: | Small Block |
| Forging Type: | Slab Side |
| Industry: | Automotive |
| Make - Web: | Chevrolet |
| Make: | Chevrolet |
| Oil Ring Thickness: | 3/16 |
| Part Number: | wisPTS525A4 |
| Piston Material: | 4032 |
| Piston Quantity: | 8 |
| Piston Volume: | -5.00 |
| Product Market: | Domestic |
| Product Series: | Pro Tru Street |
| Product Type: | Engine Piston Set |
| Ring Set Included: | Yes |
| Second Compression Ring Thickness: | 1/16 |
| Skirt Coating: | Yes |
| Title - Web: | Pro Tru Street Chevy Small Block Piston Set - 4.165 in. Bore - 1.125 .in CH, -5.00 CC |
| Title: | Pro Tru Street - Chevrolet, Small Block, 4.165 in. Bore, Piston Set |
| Top Compression Ring Thickness: | 1/16 |
| Wrist Pin Included: | Yes |
| Wrist Pin Material: | 5115 |
| Wrist Pin Outer Diameter: | 0.927 |
| Wrist Pin Style: | Floating |
Reference Information
| Reference Data (Provide these details to our support team) | |
|---|---|
| Brand Name/s | Wiseco, WISECO-PRO TRU |
| StreetFX SKU | wisPTS525A4 |
| SFX Item ID | 4064144 |
| Accounting SKU | wis-PTS525A4 |
| Manufacturer SKU | PTS525A4 |
| Manufacturer UPC | 193564093530 |
| Alternative References | PTS525A4, WIS-PTS525A4 |
Piston and Ring Kit, Pro Tru Street, Forged Aluminum, Flat Top, 4.165 in. Bore, Chevy, Small Block, Kit
Are you looking for affordable high performance for your street machine? Wiseco Pro Tru Street pistons are right up your alley! These forged 4032 aluminum pistons are complete with chromium alloy steel piston pins and Spirolox. Oversized, symmetrical, radiused valve pockets allow for maximum flow around the valves during overlap—and accommodate oversized valves and high-lift cams. Wiseco's proprietary ArmorGlide skirt coating extends piston life, increases horsepower, reduces noise, and offers much tighter dimensional tolerances than typical spray-on coatings. Choose the set designed for your vehicle and engine application. World-class, precision-machined high performance pistons—that's Wiseco value!
| Product Attributes | |
|---|---|
| Brand | Wiseco |
| Manufacturer's Part Number | PTS525A4 |
| Part Type | Pistons |
| Product Line | Wiseco Pro Tru Street Pistons |
| UPC | 00193564093530 |
| Piston Rings Included | Yes |
| Bore (in.) | 4.165 in. |
| Bore (mm) | 105.791mm |
| Stroke | 3.750 in. |
| Rod Length | 6.000 in. |
| Piston Style | Flat top, with two valve reliefs |
| Piston Material | Forged aluminum |
| Compression Height (in.) | 1.125 in. |
| Piston Head Volume (cc) | +5.00cc |
| Wrist Pin Style | Press-fit or floating |
| Wrist Pin Retainers Included | Yes |
| Wrist Pin Included | Yes |
| Pin Diameter (in.) | 0.927 in. |
| Piston Ring Thickness | 1/16 in. x 1/16 in. x 3/16 in. |
| File Fit | Yes |
| Gapless | No |
| Top Ring Thickness | 1/16 in. |
| Top Ring Material | Ductile iron |
| Top Ring Facing Material | Plasma-moly |
| Second Ring Thickness | 1/16 in. |
| Second Ring Material | Iron |
| Second Ring Facing Material | Phosphate coated |
| Oil Ring Thickness | 3/16 in. |
| Oil Ring Material | Carbon steel |
| Oil Ring Facing Material | Chrome |
| Oil Ring Tension | Standard |
| Remanufactured | No |
| Quantity | Sold as a set of 8. |
| Manufacturer Attributes | |
|---|---|
| Piston Volume | -5.00 |
| Compression Height | 1.125 |
| Bore Diameter | 4.165 |
| Piston Material | 4032 |
| Piston Quantity | 8 |
| Category Hierarchy | Auto>Pistons>Piston Kits>Domestic>Pro Tru Street |
| Industry | Automotive |
| Make | Chevrolet |
| Make - Web | Chevrolet |
| Product Market | Domestic |
| Product Type | Engine Piston Set |
| Engine Type | ICE |
| Product Series | Pro Tru Street |
| Title | Pro Tru Street - Chevrolet, Small Block, 4.165 in. Bore, Piston Set |
| Title - Web | Pro Tru Street Chevy Small Block Piston Set - 4.165 in. Bore - 1.125 .in CH, -5.00 CC |
| Forging Type | Slab Side |
| Engine | Small Block |
| Engine - Web | Small Block Gen I |
| Skirt Coating | Yes |
| Oil Ring Thickness | 3/16 |
| Ring Set Included | Yes |
| Second Compression Ring Thickness | 1/16 |
| Top Compression Ring Thickness | 1/16 |
| Wrist Pin Included | Yes |
| Wrist Pin Material | 5115 |
| Wrist Pin Outer Diameter | 0.927 |
| Wrist Pin Style | Floating |
| Out of Stock Message | Estimated Shipped Date 3-4 Weeks |
| Manufacturer Designation | Piston Set, Chevrolet, Small Block, 4.165 in. Bore, Pro Tru Street, Set of 8 |
| Product Class | Engine Piston Set |
| Construction/Type | Wiseco Chevrolet Small Block Piston Set, 4.165 in. Bore, 1.125 in. Compression Height, 0.927 in. Pin Diameter, Pro Tru Street, Set of 8. |
| Vehicle Designations | Chevrolet Small Block |
| Product Outline | <ul><li>ArmorGlide? Skirt Coating: Seizure resistant, Friction Reduction, and Quieter Operation</li><li>4032 Forged Aluminum</li><li>AS-Forged Dome with Crown Features & Oil Drain Backs</li><li>Chromium Alloy Steel Piston Pin & Spirolox? Included</li></ul> |
| Vehicle Brief | Chevy Small BlockPROTRU 1.125 5025A4 |
| Market Description | Our Pro Tru? Street series pistons are forged from 4032 alloy aluminum in Mentor, Ohio and includes rings, pins, and clips for an all-inclusive rebuild. For any build budget, Wiseco has the piston to get you on the road or down the track. |
Compatibility
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