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Chevrolet Blazer CARB legal parts

16 listings (25 part numbers) from 1 brand in 2 CARB Executive Orders name the Chevrolet Blazer, model years 1965–2003. Newest EO: August 2023.

Headers16
Each row is copied from the EO's vehicle table. Listed in a CARB EO means that part number and vehicle appear in that order; match the model year, engine and remarks to your car. Final determination by CARB / Smog Check station.

Header · 16

PerTronix Performance ProductsJBA, Doug's, and Patriot Headers
D-57-47
1830S-61830S-6JS1830S-6JT
1965–1991Chevrolet Blazer4.3L, 4.6L, 5.0L, 5.4L, 5.7L, 6.6L

Listed in CARB EO D-57-47; final determination by CARB / Smog Check station. Original PDF

PerTronix Performance ProductsJBA, Doug's, and Patriot Headers
D-57-48
1830S-61830S-6JS1830S-6JT180
1965–1991Chevrolet Blazer4.3l, 4.6L, 5.0L, 5.4L, 5.7L, 6.6L

Listed in CARB EO D-57-48; final determination by CARB / Smog Check station. Original PDF

Before you buy for a Chevrolet Blazer

  • Match the engine. The EOs here list 4.3L, 5.0L, 5.7L, 4.3L, 4.6L, 5.0L, 5.4L, 5.7L, 6.6L, 4.3l, 4.6L, 5.0L, 5.4L, 5.7L, 6.6L. A part listed for one engine is not covered on another.
  • Match the model year. Use the year filter above. EOs are often extended with new years later; a newer EO from the same brand may cover your year.
  • Read the remarks. Some rows exclude certain test groups or require keeping the factory air box or hydrocarbon trap.
  • Keep the EO label. The maker supplies a label with the EO number ("CARB D-xxx") to put under the hood for Smog Check. How to read it.

An EO exemption only says the part was found not to increase emissions on these vehicles. It says nothing about power gains, fit or warranty. What an EO does not mean.

Questions

Is there a CARB legal header for the Chevrolet Blazer?

Yes, at least in the EOs we read: 16 listings from PerTronix Performance Products name the Chevrolet Blazer for model years 1965–2003 (EO D-57-47, D-57-48). Each EO covers only the exact years, engines and part numbers in its table, so match all three to your car and keep the EO label on the part.

How do I prove a part on my Blazer is smog legal?

Keep the EO label from the part maker in the engine bay and a copy of the EO. At a Smog Check, the inspector compares the part with the EO number. If a station questions it, BAR's Smog Check Referee can inspect modified vehicles. See our guides on the EO sticker and the Referee.

EOs on this page

D-57-47D-57-48

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Header

Source: CARB aftermarket parts Executive Orders (Exhibit A vehicle tables), retrieved November 11, 2026. Independent reference, not affiliated with CARB. Rows we could not read with certainty are not shown; check the EO PDF for the full table.