6-inch center spools
The listed 6-inch option is 55 inches long. Match the diameter to the adjoining exhaust components and confirm the connection requirements.
Semi-Truck Exhaust Center Spools
Compare straight, chrome-plated steel center spools in 6-, 7- and 8-inch diameters. Choose the pipe diameter and length that match your exhaust setup, with listed lengths from 48 to 55 inches.
Check the connections, supporting hardware and available space before ordering. Diameter and length are separate measurements; a truck’s make alone does not confirm that a spool will fit.
US$203.59
US$436.99
US$467.89
US$487.29
US$504.49
US$537.29
Choose a Center Spool by Diameter and Length
7-inch center spools
Compare 52- and 55-inch lengths. Measure the space for the straight section and account for how the adjacent parts connect.
8-inch center spools
Choose from listed lengths of 48, 52 and 55 inches. Verify the pipe dimensions, routing clearance and supporting hardware for your installation.
Before ordering: Measure your current exhaust setup and compare the listed diameter, length and connection details. Check the included parts and warranty on the exact product.
Exhaust Center Spool FAQs
What is an exhaust center spool?
A center spool is a straight pipe section used when assembling or replacing part of a truck’s exhaust run. Match it to the adjoining components and the space available in your system.
Which center spool sizes are listed here?
The current selection includes a 6-inch diameter spool at 55 inches long; 7-inch spools at 52 or 55 inches long; and 8-inch spools at 48, 52 or 55 inches long. Check the product listing for the exact dimensions and current availability.
Is the 6-, 7- or 8-inch measurement the pipe length?
No. The first measurement in these product titles is the listed pipe diameter. The length follows it—for example, a 7-inch straight center spool marked 52-inch L has a listed diameter of 7 inches and length of 52 inches.
Will a center spool fit any Peterbilt, Kenworth or Freightliner?
Fitment depends on your exhaust system’s dimensions, connections and mounting arrangement. Confirm those details against the spool specifications rather than selecting by truck brand alone.
Are clamps, elbows or adapters included?
The product listings describe one center spool in the included-parts section. Check each listing before ordering and plan for any compatible clamps, elbows, adapters and supports your installation requires.
Are these center spools stainless steel?
These 6-, 7- and 8-inch center spool listings specify steel with a triple chrome-plated finish. Chrome plating is a finish and does not identify a pipe as stainless steel. Check the individual product’s material specification.
Do all center spools have the same warranty?
Warranty coverage varies by listing. Review the warranty information on the spool you select instead of assuming the same coverage applies to every size and length.