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Hi-Tek Exhaust Systems

Hi-Tek Marine Stainless Steel Manifolds of Queensland are manufacturers whose number one priority is customer satisfaction and service excellence. Every manifold and riser is fabricated and hand welded by highly trained and experienced staff.

Product Features:

• Polished finished
• Zinc anode (replaceable)
• Approx. 1/4 the weight of cast manifolds
• Smooth even flow of cooling water to all surfaces
• Replaces Stock OEM Exhaust systems
• Standard replacement exact fittings and higher than standard eg. 3", 6" 12" etc. manifolds
• One piece design eliminates the possibility of gasket failure resulting in engine failure
• Only one water inlet reduces the chances of leaking
• 5 Year Limited Warranty

Hi-Tek vs Indmar (350 Chevy)
260 HP Mercruiser Dyno Test
260 Mercruiser Test Dyno Report

1. Water mixes with exhaust gases
2. Extractor design for cylinder scavenging for maximum efficiency
3. One piece design eliminates the possibility of gasket failure resulting in engine failure
4. Only one water inlet reduces the chances of leaking
5. Anode prevents electrolysis

How to measure riser height

Click on the part number to check pricing or place an order.

Small Block Chevy
	Part No. Description 652-HT39 308 Indmar Replacement Exhaust Manifolds 652-HT36 350 Chevy Indmar Replacement Exhaust Manifolds 652-HT40 350 Chevy Indmar Replacement Exhaust Manifolds, 3-1/2" Hose 652-HT59 350 Chevy Late Model Indmar Replacement Exhaust Manifolds 652-HT12 350 Chevy Mercruiser 3" Higher Replacement Exhaust Manifolds 652-HT14 350 Chevy OMC Center Rise Replacement Exhaust Manifolds 652-HT16 350 Chevy OMC End Dump Replacement Exhaust Manifolds 652-HT3 5.7L Chevrolet Mercruiser Replacement Exhaust Manifolds, 3" Hose 652-HT1 5.7L Chevrolet Mercruiser Replacement Exhaust Manifolds, 4" Hose 652-HT2 5.7L Chevrolet Mercruiser Replacement Exhaust Manifolds, End Dump 652-HT41 GM LS Exhaust Manifold 4.8, 5.3, 6.0, 6.2, 7.0L Replacement Exhaust Manifolds 652-HT11 Mercruiser 6.2 Center Rise Replacement Exhaust Manifolds, 4" Hose 652-HT57 PCM 350 Chevy Replacement Exhaust Manifolds 652-HT28 Volvo 350 Early Chevy Center Rise Replacement Exhaust Manifolds 652-HT25 Volvo 350 Late Chevy Center Rise Replacement Exhaust Manifolds 652-HT54 Yamaha 5.7L V8 Replacement Exhaust Manifolds
Big Block Chevy
	Part No. Description 652-HT31 7.4L 3 Piece Volvo Replacement Exhaust Manifolds 652-HT6 7.4L Chevrolet Mercruiser Replacement Exhaust Manifolds 4" Hose 652-HT8 7.4L Chevrolet Mercruiser Replacement Exhaust Manifolds, 3" Hose 652-HT38 7.4L Indmar Replacement Exhaust Manifolds 652-HT43 PCM 7.4L Chevy Replacement Exhaust Manifolds
Small Block Ford
	Part No. Description 652-HT37 302/351 Ford Indmar Replacement Exhaust Manifolds 652-HT55 351 Ford Cleveland Indmar Replacement Exhaust Manifolds 652-HT19 351 Ford OMC Center Rise Replacement Exhaust Manifolds 652-HT27 5.8 Ford Volvo Late Model Replacement Exhaust Manifolds 652-HT4 5.8L Small Block Ford Replacment Exhaust Manifolds, End Dump 652-HT56 Ford 302/351 OMC Early Model Replacement Exhaust Manifolds 652-HT44 PCM 351 Ford Replacement Exhaust Manifolds, 3" Turned Up End 652-HT42 PCM 351 Ford Replacement Exhaust Manifolds, 3-1/2" Hose
Big Block Ford
	Part No. Description 652-HT58 427 Ford Indmar Style Replacement Exhaust Manifolds 652-HT18 460 Cobra OMC Replacement Exhaust Manifolds
Four Cylinder
	Part No. Description 652-HT15 2.3L OMC 4 Cylinder Replacment Exhaust Manifolds 652-HT51 AQ 140/120 Volvo Replacement Exhaust Manifolds 652-HT30 Volvo 120HP 4 Cylinder Replacement Exhaust Manifolds 652-HT23 Volvo AQ 171 4 Cylinder Replacement Exhaust Manifolds
V6 Chevy
	Part No. Description 652-HT5 4.3L V6 Chevrolet Mercruiser Replacement Exhaust Manifolds, 4" Hose 652-HT26 Volvo V6 Late GM Replacement Exhaust Manifolds 652-HT17 4.3L V6 Chevrolet OMC Replacement Exhaust Manifolds 652-HT7 LX Mercruiser V6 One Piece Replacement Exhaust Manifolds 652-HT9 V6 Mercruiser Replacement Exhaust Manifolds, 3" Hose 652-HT24 Volvo V6 Early GM Replacement Exhaust Manifolds